2 * threadpool.c: global thread pool
5 * Dietmar Maurer (dietmar@ximian.com)
6 * Gonzalo Paniagua Javier (gonzalo@ximian.com)
8 * Copyright 2001-2003 Ximian, Inc (http://www.ximian.com)
9 * Copyright 2004-2010 Novell, Inc (http://www.novell.com)
15 #ifdef MONO_SMALL_CONFIG
16 #define QUEUE_LENGTH 16 /* Must be 2^N */
17 #define MAX_POOL_THREADS 128
19 #define QUEUE_LENGTH 64 /* Must be 2^N */
20 #define MAX_POOL_THREADS 1024
23 #include <mono/metadata/domain-internals.h>
24 #include <mono/metadata/tabledefs.h>
25 #include <mono/metadata/threads.h>
26 #include <mono/metadata/threads-types.h>
27 #include <mono/metadata/threadpool-internals.h>
28 #include <mono/metadata/exception.h>
29 #include <mono/metadata/file-io.h>
30 #include <mono/metadata/monitor.h>
31 #include <mono/metadata/mono-mlist.h>
32 #include <mono/metadata/marshal.h>
33 #include <mono/metadata/mono-perfcounters.h>
34 #include <mono/metadata/socket-io.h>
35 #include <mono/metadata/mono-wsq.h>
36 #include <mono/io-layer/io-layer.h>
37 #include <mono/metadata/gc-internal.h>
38 #include <mono/utils/mono-time.h>
39 #include <mono/utils/mono-proclib.h>
40 #include <mono/utils/mono-semaphore.h>
42 #ifdef HAVE_SYS_TIME_H
45 #include <sys/types.h>
51 #ifdef HAVE_SYS_SOCKET_H
52 #include <sys/socket.h>
54 #include <mono/utils/mono-poll.h>
56 #include <sys/epoll.h>
59 #ifndef DISABLE_SOCKETS
60 #include "mono/io-layer/socket-wrappers.h"
63 #include "threadpool.h"
65 #define THREAD_WANTS_A_BREAK(t) ((t->state & (ThreadState_StopRequested | \
66 ThreadState_SuspendRequested)) != 0)
68 #define SPIN_TRYLOCK(i) (InterlockedCompareExchange (&(i), 1, 0) == 0)
69 #define SPIN_LOCK(i) do { \
70 if (SPIN_TRYLOCK (i)) \
74 #define SPIN_UNLOCK(i) i = 0
76 #define EPOLL_DEBUG(...)
77 #define EPOLL_DEBUG_STMT(...)
79 #define TP_DEBUG_STMT(...)
82 #define EPOLL_DEBUG(...) g_message(__VA_ARGS__)
83 #define EPOLL_DEBUG_STMT(...) do { __VA_ARGS__ } while (0)
84 #define TP_DEBUG(...) g_message(__VA_ARGS__)
85 #define TP_DEBUG_STMT(...) do { __VA_ARGS__ } while (0)
88 /* map of CounterSample.cs */
89 struct _MonoCounterSample {
92 gint64 counterFrequency;
93 gint64 systemFrequency;
95 gint64 timeStamp100nSec;
96 gint64 counterTimeStamp;
100 /* mono_thread_pool_init called */
101 static volatile int tp_inited;
104 CRITICAL_SECTION io_lock; /* access to sock_to_state */
107 MonoGHashTable *sock_to_state;
109 HANDLE new_sem; /* access to newpfd and write side of the pipe */
111 gboolean epoll_disabled;
117 static SocketIOData socket_io_data;
119 /* Keep in sync with the System.MonoAsyncCall class which provides GC tracking */
122 MonoMethodMessage *msg;
123 MonoMethod *cb_method;
124 MonoDelegate *cb_target;
132 MonoMList *first; /* GC root */
134 MonoMList *unused; /* Up to 20 chunks. GC root */
138 volatile gint waiting; /* threads waiting for a work item */
141 volatile gint pool_status; /* 0 -> not initialized, 1 -> initialized, 2 -> cleaning up */
142 /* min, max, n and busy -> Interlocked */
143 volatile gint min_threads;
144 volatile gint max_threads;
145 volatile gint nthreads;
146 volatile gint busy_threads;
148 void (*async_invoke) (gpointer data);
149 void *pc_nitems; /* Performance counter for total number of items in added */
150 void *pc_nthreads; /* Performance counter for total number of active threads */
152 volatile gint destroy_thread;
153 volatile gint ignore_times; /* Used when there's a thread being created or destroyed */
154 volatile gint sp_lock; /* spin lock used to protect ignore_times */
155 volatile gint64 last_check;
156 volatile gint64 time_sum;
160 //TP_DEBUG_ONLY (gint nodes_created);
161 //TP_DEBUG_ONLY (gint nodes_reused);
165 static ThreadPool async_tp;
166 static ThreadPool async_io_tp;
168 static void async_invoke_thread (gpointer data);
169 static MonoObject *mono_async_invoke (ThreadPool *tp, MonoAsyncResult *ares);
170 static void threadpool_free_queue (ThreadPool *tp);
171 static void threadpool_append_job (ThreadPool *tp, MonoObject *ar);
172 static void threadpool_append_jobs (ThreadPool *tp, MonoObject **jobs, gint njobs);
173 static void threadpool_init (ThreadPool *tp, int min_threads, int max_threads, void (*async_invoke) (gpointer));
174 static void threadpool_start_idle_threads (ThreadPool *tp);
175 static void threadpool_kill_idle_threads (ThreadPool *tp);
177 static MonoClass *async_call_klass;
178 static MonoClass *socket_async_call_klass;
179 static MonoClass *process_async_call_klass;
181 static GPtrArray *wsqs;
182 CRITICAL_SECTION wsqs_lock;
185 static MonoThreadPoolFunc tp_start_func;
186 static MonoThreadPoolFunc tp_finish_func;
187 static gpointer tp_hooks_user_data;
188 static MonoThreadPoolItemFunc tp_item_begin_func;
189 static MonoThreadPoolItemFunc tp_item_end_func;
190 static gpointer tp_item_user_data;
192 #define INIT_POLLFD(a, b, c) {(a)->fd = b; (a)->events = c; (a)->revents = 0;}
201 AIO_OP_RECV_JUST_CALLBACK,
202 AIO_OP_SEND_JUST_CALLBACK,
207 #ifdef DISABLE_SOCKETS
208 #define socket_io_cleanup(x)
211 socket_io_cleanup (SocketIOData *data)
213 if (data->inited == 0)
216 EnterCriticalSection (&data->io_lock);
219 closesocket (data->pipe [0]);
220 closesocket (data->pipe [1]);
222 if (data->pipe [0] > -1)
223 close (data->pipe [0]);
224 if (data->pipe [1] > -1)
225 close (data->pipe [1]);
230 CloseHandle (data->new_sem);
231 data->new_sem = NULL;
232 mono_g_hash_table_destroy (data->sock_to_state);
233 data->sock_to_state = NULL;
234 g_free (data->newpfd);
237 if (FALSE == data->epoll_disabled)
238 close (data->epollfd);
240 LeaveCriticalSection (&data->io_lock);
244 get_event_from_state (MonoSocketAsyncResult *state)
246 switch (state->operation) {
249 case AIO_OP_RECV_JUST_CALLBACK:
250 case AIO_OP_RECEIVEFROM:
251 case AIO_OP_READPIPE:
254 case AIO_OP_SEND_JUST_CALLBACK:
258 default: /* Should never happen */
259 g_message ("get_event_from_state: unknown value in switch!!!");
265 get_events_from_list (MonoMList *list)
267 MonoSocketAsyncResult *state;
270 while (list && (state = (MonoSocketAsyncResult *)mono_mlist_get_data (list))) {
271 events |= get_event_from_state (state);
272 list = mono_mlist_next (list);
278 #define ICALL_RECV(x) ves_icall_System_Net_Sockets_Socket_Receive_internal (\
279 (SOCKET)(gssize)x->handle, x->buffer, x->offset, x->size,\
280 x->socket_flags, &x->error);
282 #define ICALL_SEND(x) ves_icall_System_Net_Sockets_Socket_Send_internal (\
283 (SOCKET)(gssize)x->handle, x->buffer, x->offset, x->size,\
284 x->socket_flags, &x->error);
286 #endif /* !DISABLE_SOCKETS */
289 threadpool_jobs_inc (MonoObject *obj)
292 InterlockedIncrement (&obj->vtable->domain->threadpool_jobs);
296 threadpool_jobs_dec (MonoObject *obj)
298 MonoDomain *domain = obj->vtable->domain;
299 int remaining_jobs = InterlockedDecrement (&domain->threadpool_jobs);
300 if (remaining_jobs == 0 && domain->cleanup_semaphore) {
301 ReleaseSemaphore (domain->cleanup_semaphore, 1, NULL);
309 get_io_event (MonoMList **list, gint event)
319 state = mono_mlist_get_data (current);
320 if (get_event_from_state ((MonoSocketAsyncResult *) state) == event)
325 current = mono_mlist_next (current);
330 mono_mlist_set_next (prev, mono_mlist_next (current));
332 *list = mono_mlist_next (*list);
341 process_io_event (MonoMList *list, int event)
343 MonoSocketAsyncResult *state;
349 state = (MonoSocketAsyncResult *) mono_mlist_get_data (list);
350 if (get_event_from_state (state) == event)
353 list = mono_mlist_next (list);
357 oldlist = mono_mlist_remove_item (oldlist, list);
358 EPOLL_DEBUG ("Dispatching event %d on socket %p", event, state->handle);
359 threadpool_append_job (&async_io_tp, (MonoObject *) state);
366 mark_bad_fds (mono_pollfd *pfds, int nfds)
372 for (i = 0; i < nfds; i++) {
377 ret = mono_poll (pfd, 1, 0);
378 if (ret == -1 && errno == EBADF) {
379 pfd->revents |= MONO_POLLNVAL;
381 } else if (ret == 1) {
390 socket_io_poll_main (gpointer p)
392 #if MONO_SMALL_CONFIG
393 #define INITIAL_POLLFD_SIZE 128
395 #define INITIAL_POLLFD_SIZE 1024
397 #define POLL_ERRORS (MONO_POLLERR | MONO_POLLHUP | MONO_POLLNVAL)
398 SocketIOData *data = p;
403 MonoInternalThread *thread;
405 thread = mono_thread_internal_current ();
407 allocated = INITIAL_POLLFD_SIZE;
408 pfds = g_new0 (mono_pollfd, allocated);
409 INIT_POLLFD (pfds, data->pipe [0], MONO_POLLIN);
410 for (i = 1; i < allocated; i++)
411 INIT_POLLFD (&pfds [i], -1, 0);
421 if (THREAD_WANTS_A_BREAK (thread))
422 mono_thread_interruption_checkpoint ();
425 nsock = mono_poll (pfds, maxfd, -1);
426 } while (nsock == -1 && errno == EINTR);
429 * Apart from EINTR, we only check EBADF, for the rest:
430 * EINVAL: mono_poll() 'protects' us from descriptor
431 * numbers above the limit if using select() by marking
432 * then as MONO_POLLERR. If a system poll() is being
433 * used, the number of descriptor we're passing will not
434 * be over sysconf(_SC_OPEN_MAX), as the error would have
435 * happened when opening.
437 * EFAULT: we own the memory pointed by pfds.
438 * ENOMEM: we're doomed anyway
442 if (nsock == -1 && errno == EBADF) {
443 pfds->revents = 0; /* Just in case... */
444 nsock = mark_bad_fds (pfds, maxfd);
447 if ((pfds->revents & POLL_ERRORS) != 0) {
448 /* We're supposed to die now, as the pipe has been closed */
450 socket_io_cleanup (data);
454 /* Got a new socket */
455 if ((pfds->revents & MONO_POLLIN) != 0) {
458 for (i = 1; i < allocated; i++) {
460 if (pfd->fd == -1 || pfd->fd == data->newpfd->fd)
464 if (i == allocated) {
469 allocated = allocated * 2;
470 pfds = g_renew (mono_pollfd, oldfd, allocated);
472 for (; i < allocated; i++)
473 INIT_POLLFD (&pfds [i], -1, 0);
476 nread = read (data->pipe [0], one, 1);
478 nread = recv ((SOCKET) data->pipe [0], one, 1, 0);
482 return; /* we're closed */
485 INIT_POLLFD (&pfds [i], data->newpfd->fd, data->newpfd->events);
486 ReleaseSemaphore (data->new_sem, 1, NULL);
495 EnterCriticalSection (&data->io_lock);
496 if (data->inited == 0) {
498 LeaveCriticalSection (&data->io_lock);
499 return; /* cleanup called */
502 for (i = 1; i < maxfd && nsock > 0; i++) {
504 if (pfd->fd == -1 || pfd->revents == 0)
508 list = mono_g_hash_table_lookup (data->sock_to_state, GINT_TO_POINTER (pfd->fd));
509 if (list != NULL && (pfd->revents & (MONO_POLLIN | POLL_ERRORS)) != 0) {
510 list = process_io_event (list, MONO_POLLIN);
513 if (list != NULL && (pfd->revents & (MONO_POLLOUT | POLL_ERRORS)) != 0) {
514 list = process_io_event (list, MONO_POLLOUT);
518 mono_g_hash_table_replace (data->sock_to_state, GINT_TO_POINTER (pfd->fd), list);
519 pfd->events = get_events_from_list (list);
521 mono_g_hash_table_remove (data->sock_to_state, GINT_TO_POINTER (pfd->fd));
527 LeaveCriticalSection (&data->io_lock);
532 #define EPOLL_ERRORS (EPOLLERR | EPOLLHUP)
533 #define EPOLL_NEVENTS 128
535 socket_io_epoll_main (gpointer p)
539 MonoInternalThread *thread;
540 struct epoll_event *events, *evt;
542 gpointer async_results [EPOLL_NEVENTS * 2]; // * 2 because each loop can add up to 2 results here
546 epollfd = data->epollfd;
547 thread = mono_thread_internal_current ();
548 events = g_new0 (struct epoll_event, EPOLL_NEVENTS);
553 if (THREAD_WANTS_A_BREAK (thread))
554 mono_thread_interruption_checkpoint ();
556 EPOLL_DEBUG ("epoll_wait init");
557 ready = epoll_wait (epollfd, events, EPOLL_NEVENTS, -1);
560 EPOLL_DEBUG ("epoll_wait end with %d ready sockets (%d %s).", ready, err, (err) ? g_strerror (err) : "");
563 } while (ready == -1 && errno == EINTR);
569 g_warning ("epoll_wait: %d %s", err, g_strerror (err));
575 EnterCriticalSection (&data->io_lock);
576 if (data->inited == 0) {
577 EPOLL_DEBUG ("data->inited == 0");
580 return; /* cleanup called */
584 for (i = 0; i < ready; i++) {
591 list = mono_g_hash_table_lookup (data->sock_to_state, GINT_TO_POINTER (fd));
592 EPOLL_DEBUG ("Event %d on %d list length: %d", evt->events, fd, mono_mlist_length (list));
593 if (list != NULL && (evt->events & (EPOLLIN | EPOLL_ERRORS)) != 0) {
594 ares = get_io_event (&list, MONO_POLLIN);
596 async_results [nresults++] = ares;
599 if (list != NULL && (evt->events & (EPOLLOUT | EPOLL_ERRORS)) != 0) {
600 ares = get_io_event (&list, MONO_POLLOUT);
602 async_results [nresults++] = ares;
606 mono_g_hash_table_replace (data->sock_to_state, GINT_TO_POINTER (fd), list);
607 evt->events = get_events_from_list (list);
608 EPOLL_DEBUG ("MOD %d to %d", fd, evt->events);
609 if (epoll_ctl (epollfd, EPOLL_CTL_MOD, fd, evt)) {
610 if (epoll_ctl (epollfd, EPOLL_CTL_ADD, fd, evt) == -1) {
613 EPOLL_DEBUG ("epoll_ctl(MOD): %d %s fd: %d events: %d", err, g_strerror (err), fd, evt->events);
619 mono_g_hash_table_remove (data->sock_to_state, GINT_TO_POINTER (fd));
620 EPOLL_DEBUG ("DEL %d", fd);
621 epoll_ctl (epollfd, EPOLL_CTL_DEL, fd, evt);
624 LeaveCriticalSection (&data->io_lock);
625 threadpool_append_jobs (&async_io_tp, (MonoObject **) async_results, nresults);
626 memset (async_results, 0, sizeof (gpointer) * nresults);
633 * select/poll wake up when a socket is closed, but epoll just removes
634 * the socket from its internal list without notification.
637 mono_thread_pool_remove_socket (int sock)
639 MonoMList *list, *next;
640 MonoSocketAsyncResult *state;
642 if (socket_io_data.inited == FALSE)
645 EnterCriticalSection (&socket_io_data.io_lock);
646 list = mono_g_hash_table_lookup (socket_io_data.sock_to_state, GINT_TO_POINTER (sock));
648 mono_g_hash_table_remove (socket_io_data.sock_to_state, GINT_TO_POINTER (sock));
650 LeaveCriticalSection (&socket_io_data.io_lock);
653 state = (MonoSocketAsyncResult *) mono_mlist_get_data (list);
654 if (state->operation == AIO_OP_RECEIVE)
655 state->operation = AIO_OP_RECV_JUST_CALLBACK;
656 else if (state->operation == AIO_OP_SEND)
657 state->operation = AIO_OP_SEND_JUST_CALLBACK;
659 next = mono_mlist_remove_item (list, list);
660 list = process_io_event (list, MONO_POLLIN);
662 process_io_event (list, MONO_POLLOUT);
670 connect_hack (gpointer x)
672 struct sockaddr_in *addr = (struct sockaddr_in *) x;
675 while (connect ((SOCKET) socket_io_data.pipe [1], (SOCKADDR *) addr, sizeof (struct sockaddr_in))) {
678 g_warning ("Error initializing async. sockets %d.", WSAGetLastError ());
679 g_assert (WSAGetLastError ());
686 socket_io_init (SocketIOData *data)
689 struct sockaddr_in server;
690 struct sockaddr_in client;
697 inited = InterlockedCompareExchange (&data->inited, -1, -1);
701 EnterCriticalSection (&data->io_lock);
702 inited = InterlockedCompareExchange (&data->inited, -1, -1);
704 LeaveCriticalSection (&data->io_lock);
709 data->epoll_disabled = (g_getenv ("MONO_DISABLE_AIO") != NULL);
710 if (FALSE == data->epoll_disabled) {
711 data->epollfd = epoll_create (256);
712 data->epoll_disabled = (data->epollfd == -1);
713 if (data->epoll_disabled && g_getenv ("MONO_DEBUG"))
714 g_message ("epoll_create() failed. Using plain poll().");
719 data->epoll_disabled = TRUE;
723 if (data->epoll_disabled) {
724 if (pipe (data->pipe) != 0) {
734 srv = socket (AF_INET, SOCK_STREAM, IPPROTO_TCP);
735 g_assert (srv != INVALID_SOCKET);
736 data->pipe [1] = socket (AF_INET, SOCK_STREAM, IPPROTO_TCP);
737 g_assert (data->pipe [1] != INVALID_SOCKET);
739 server.sin_family = AF_INET;
740 server.sin_addr.s_addr = inet_addr ("127.0.0.1");
742 if (bind (srv, (SOCKADDR *) &server, sizeof (server))) {
743 g_print ("%d\n", WSAGetLastError ());
747 len = sizeof (server);
748 getsockname (srv, (SOCKADDR *) &server, &len);
750 mono_thread_create (mono_get_root_domain (), connect_hack, &server);
751 len = sizeof (server);
752 data->pipe [0] = accept (srv, (SOCKADDR *) &client, &len);
753 g_assert (data->pipe [0] != INVALID_SOCKET);
756 data->sock_to_state = mono_g_hash_table_new_type (g_direct_hash, g_direct_equal, MONO_HASH_VALUE_GC);
758 if (data->epoll_disabled) {
759 data->new_sem = CreateSemaphore (NULL, 1, 1, NULL);
760 g_assert (data->new_sem != NULL);
763 stack_size = mono_threads_get_default_stacksize ();
764 mono_threads_set_default_stacksize (256 * 1024);
765 if (data->epoll_disabled) {
766 mono_thread_create_internal (mono_get_root_domain (), socket_io_poll_main, data, TRUE);
770 mono_thread_create_internal (mono_get_root_domain (), socket_io_epoll_main, data, TRUE);
773 mono_threads_set_default_stacksize (stack_size);
774 InterlockedCompareExchange (&data->inited, 1, 0);
775 LeaveCriticalSection (&data->io_lock);
779 socket_io_add_poll (MonoSocketAsyncResult *state)
784 SocketIOData *data = &socket_io_data;
787 #if defined(PLATFORM_MACOSX) || defined(PLATFORM_BSD) || defined(HOST_WIN32) || defined(PLATFORM_SOLARIS)
788 /* select() for connect() does not work well on the Mac. Bug #75436. */
789 /* Bug #77637 for the BSD 6 case */
790 /* Bug #78888 for the Windows case */
791 if (state->operation == AIO_OP_CONNECT && state->blocking == TRUE) {
792 //FIXME: increment number of threads while this one is waiting?
793 threadpool_append_job (&async_io_tp, (MonoObject *) state);
797 WaitForSingleObject (data->new_sem, INFINITE);
798 if (data->newpfd == NULL)
799 data->newpfd = g_new0 (mono_pollfd, 1);
801 EnterCriticalSection (&data->io_lock);
802 /* FIXME: 64 bit issue: handle can be a pointer on windows? */
803 list = mono_g_hash_table_lookup (data->sock_to_state, GINT_TO_POINTER (state->handle));
805 list = mono_mlist_alloc ((MonoObject*)state);
807 list = mono_mlist_append (list, (MonoObject*)state);
810 events = get_events_from_list (list);
811 INIT_POLLFD (data->newpfd, GPOINTER_TO_INT (state->handle), events);
812 mono_g_hash_table_replace (data->sock_to_state, GINT_TO_POINTER (state->handle), list);
813 LeaveCriticalSection (&data->io_lock);
814 *msg = (char) state->operation;
816 w = write (data->pipe [1], msg, 1);
819 send ((SOCKET) data->pipe [1], msg, 1, 0);
825 socket_io_add_epoll (MonoSocketAsyncResult *state)
828 SocketIOData *data = &socket_io_data;
829 struct epoll_event event;
833 memset (&event, 0, sizeof (struct epoll_event));
834 fd = GPOINTER_TO_INT (state->handle);
835 EnterCriticalSection (&data->io_lock);
836 list = mono_g_hash_table_lookup (data->sock_to_state, GINT_TO_POINTER (fd));
838 list = mono_mlist_alloc ((MonoObject*)state);
839 epoll_op = EPOLL_CTL_ADD;
841 list = mono_mlist_append (list, (MonoObject*)state);
842 epoll_op = EPOLL_CTL_MOD;
845 ievt = get_events_from_list (list);
846 if ((ievt & MONO_POLLIN) != 0)
847 event.events |= EPOLLIN;
848 if ((ievt & MONO_POLLOUT) != 0)
849 event.events |= EPOLLOUT;
851 mono_g_hash_table_replace (data->sock_to_state, state->handle, list);
853 EPOLL_DEBUG ("%s %d with %d", epoll_op == EPOLL_CTL_ADD ? "ADD" : "MOD", fd, event.events);
854 if (epoll_ctl (data->epollfd, epoll_op, fd, &event) == -1) {
856 if (epoll_op == EPOLL_CTL_ADD && err == EEXIST) {
857 epoll_op = EPOLL_CTL_MOD;
858 if (epoll_ctl (data->epollfd, epoll_op, fd, &event) == -1) {
859 g_message ("epoll_ctl(MOD): %d %s", err, g_strerror (err));
863 LeaveCriticalSection (&data->io_lock);
870 socket_io_add (MonoAsyncResult *ares, MonoSocketAsyncResult *state)
872 socket_io_init (&socket_io_data);
873 MONO_OBJECT_SETREF (state, ares, ares);
875 if (socket_io_data.epoll_disabled == FALSE) {
876 if (socket_io_add_epoll (state))
880 socket_io_add_poll (state);
883 #ifndef DISABLE_SOCKETS
885 socket_io_filter (MonoObject *target, MonoObject *state)
888 MonoSocketAsyncResult *sock_res = (MonoSocketAsyncResult *) state;
891 if (target == NULL || state == NULL)
894 if (socket_async_call_klass == NULL) {
895 klass = target->vtable->klass;
896 /* Check if it's SocketAsyncCall in System.Net.Sockets
897 * FIXME: check the assembly is signed correctly for extra care
899 if (klass->name [0] == 'S' && strcmp (klass->name, "SocketAsyncCall") == 0
900 && strcmp (mono_image_get_name (klass->image), "System") == 0
901 && klass->nested_in && strcmp (klass->nested_in->name, "Socket") == 0)
902 socket_async_call_klass = klass;
905 if (process_async_call_klass == NULL) {
906 klass = target->vtable->klass;
907 /* Check if it's AsyncReadHandler in System.Diagnostics.Process
908 * FIXME: check the assembly is signed correctly for extra care
910 if (klass->name [0] == 'A' && strcmp (klass->name, "AsyncReadHandler") == 0
911 && strcmp (mono_image_get_name (klass->image), "System") == 0
912 && klass->nested_in && strcmp (klass->nested_in->name, "Process") == 0)
913 process_async_call_klass = klass;
915 /* return both when socket_async_call_klass has not been seen yet and when
916 * the object is not an instance of the class.
918 if (target->vtable->klass != socket_async_call_klass && target->vtable->klass != process_async_call_klass)
921 op = sock_res->operation;
922 if (op < AIO_OP_FIRST || op >= AIO_OP_LAST)
927 #endif /* !DISABLE_SOCKETS */
929 /* Returns the exception thrown when invoking, if any */
931 mono_async_invoke (ThreadPool *tp, MonoAsyncResult *ares)
933 ASyncCall *ac = (ASyncCall *)ares->object_data;
934 MonoObject *res, *exc = NULL;
935 MonoArray *out_args = NULL;
936 HANDLE wait_event = NULL;
938 if (ares->execution_context) {
939 /* use captured ExecutionContext (if available) */
940 MONO_OBJECT_SETREF (ares, original_context, mono_thread_get_execution_context ());
941 mono_thread_set_execution_context (ares->execution_context);
943 ares->original_context = NULL;
947 /* Fast path from ThreadPool.*QueueUserWorkItem */
948 void *pa = ares->async_state;
949 mono_runtime_delegate_invoke (ares->async_delegate, &pa, &exc);
952 res = mono_message_invoke (ares->async_delegate, ac->msg, &exc, &out_args);
953 MONO_OBJECT_SETREF (ac, res, res);
954 MONO_OBJECT_SETREF (ac, msg->exc, exc);
955 MONO_OBJECT_SETREF (ac, out_args, out_args);
957 mono_monitor_enter ((MonoObject *) ares);
959 if (ares->handle != NULL)
960 wait_event = mono_wait_handle_get_handle ((MonoWaitHandle *) ares->handle);
961 mono_monitor_exit ((MonoObject *) ares);
962 /* notify listeners */
963 if (wait_event != NULL)
964 SetEvent (wait_event);
966 /* call async callback if cb_method != null*/
967 if (ac != NULL && ac->cb_method) {
968 MonoObject *exc = NULL;
970 mono_runtime_invoke (ac->cb_method, ac->cb_target, pa, &exc);
971 /* 'exc' will be the previous ac->msg->exc if not NULL and not
972 * catched. If catched, this will be set to NULL and the
973 * exception will not be printed. */
974 MONO_OBJECT_SETREF (ac->msg, exc, exc);
978 /* restore original thread execution context if flow isn't suppressed, i.e. non null */
979 if (ares->original_context) {
980 mono_thread_set_execution_context (ares->original_context);
981 ares->original_context = NULL;
987 threadpool_start_idle_threads (ThreadPool *tp)
994 if (n >= tp->min_threads)
996 if (InterlockedCompareExchange (&tp->nthreads, n + 1, n) == n)
999 mono_perfcounter_update_value (tp->pc_nthreads, TRUE, 1);
1000 mono_thread_create_internal (mono_get_root_domain (), tp->async_invoke, tp, TRUE);
1001 SleepEx (100, TRUE);
1006 threadpool_init (ThreadPool *tp, int min_threads, int max_threads, void (*async_invoke) (gpointer))
1008 memset (tp, 0, sizeof (ThreadPool));
1009 MONO_SEM_INIT (&tp->lock, 1);
1010 tp->min_threads = min_threads;
1011 tp->max_threads = max_threads;
1012 tp->async_invoke = async_invoke;
1013 MONO_SEM_INIT (&tp->new_job, 0);
1017 init_perf_counter (const char *category, const char *counter)
1019 MonoString *category_str;
1020 MonoString *counter_str;
1021 MonoString *machine;
1026 if (category == NULL || counter == NULL)
1028 root = mono_get_root_domain ();
1029 category_str = mono_string_new (root, category);
1030 counter_str = mono_string_new (root, counter);
1031 machine = mono_string_new (root, ".");
1032 return mono_perfcounter_get_impl (category_str, counter_str, NULL, machine, &type, &custom);
1036 mono_thread_pool_init ()
1038 gint threads_per_cpu = 1;
1040 gint cpu_count = mono_cpu_count ();
1046 result = InterlockedCompareExchange (&tp_inited, 1, 0);
1055 MONO_GC_REGISTER_ROOT (async_tp.first);
1056 MONO_GC_REGISTER_ROOT (async_tp.last);
1057 MONO_GC_REGISTER_ROOT (async_tp.unused);
1058 MONO_GC_REGISTER_ROOT (async_io_tp.first);
1059 MONO_GC_REGISTER_ROOT (async_io_tp.unused);
1060 MONO_GC_REGISTER_ROOT (async_io_tp.last);
1062 MONO_GC_REGISTER_ROOT (socket_io_data.sock_to_state);
1063 InitializeCriticalSection (&socket_io_data.io_lock);
1064 if (g_getenv ("MONO_THREADS_PER_CPU") != NULL) {
1065 threads_per_cpu = atoi (g_getenv ("MONO_THREADS_PER_CPU"));
1066 if (threads_per_cpu < 1)
1067 threads_per_cpu = 1;
1070 thread_count = MIN (cpu_count * threads_per_cpu, MAX_POOL_THREADS);
1071 threadpool_init (&async_tp, thread_count, MAX_POOL_THREADS, async_invoke_thread);
1072 threadpool_init (&async_io_tp, cpu_count * 2, cpu_count * 4, async_invoke_thread);
1073 async_io_tp.is_io = TRUE;
1075 async_call_klass = mono_class_from_name (mono_defaults.corlib, "System", "MonoAsyncCall");
1076 g_assert (async_call_klass);
1078 InitializeCriticalSection (&wsqs_lock);
1079 wsqs = g_ptr_array_sized_new (MAX_POOL_THREADS);
1082 async_tp.pc_nitems = init_perf_counter ("Mono Threadpool", "Work Items Added");
1083 g_assert (async_tp.pc_nitems);
1085 async_io_tp.pc_nitems = init_perf_counter ("Mono Threadpool", "IO Work Items Added");
1086 g_assert (async_io_tp.pc_nitems);
1088 async_tp.pc_nthreads = init_perf_counter ("Mono Threadpool", "# of Threads");
1089 g_assert (async_tp.pc_nthreads);
1091 async_io_tp.pc_nthreads = init_perf_counter ("Mono Threadpool", "# of IO Threads");
1092 g_assert (async_io_tp.pc_nthreads);
1097 mono_thread_pool_add (MonoObject *target, MonoMethodMessage *msg, MonoDelegate *async_callback,
1100 MonoDomain *domain = mono_domain_get ();
1101 MonoAsyncResult *ares;
1104 ac = (ASyncCall*)mono_object_new (domain, async_call_klass);
1105 MONO_OBJECT_SETREF (ac, msg, msg);
1106 MONO_OBJECT_SETREF (ac, state, state);
1108 if (async_callback) {
1109 ac->cb_method = mono_get_delegate_invoke (((MonoObject *)async_callback)->vtable->klass);
1110 MONO_OBJECT_SETREF (ac, cb_target, async_callback);
1113 ares = mono_async_result_new (domain, NULL, ac->state, NULL, (MonoObject*)ac);
1114 MONO_OBJECT_SETREF (ares, async_delegate, target);
1116 #ifndef DISABLE_SOCKETS
1117 if (socket_io_filter (target, state)) {
1118 socket_io_add (ares, (MonoSocketAsyncResult *) state);
1122 threadpool_append_job (&async_tp, (MonoObject *) ares);
1127 mono_thread_pool_finish (MonoAsyncResult *ares, MonoArray **out_args, MonoObject **exc)
1135 /* check if already finished */
1136 mono_monitor_enter ((MonoObject *) ares);
1138 if (ares->endinvoke_called) {
1139 *exc = (MonoObject *) mono_get_exception_invalid_operation (NULL);
1140 mono_monitor_exit ((MonoObject *) ares);
1144 ares->endinvoke_called = 1;
1145 /* wait until we are really finished */
1146 if (!ares->completed) {
1147 if (ares->handle == NULL) {
1148 wait_event = CreateEvent (NULL, TRUE, FALSE, NULL);
1149 g_assert(wait_event != 0);
1150 MONO_OBJECT_SETREF (ares, handle, (MonoObject *) mono_wait_handle_new (mono_object_domain (ares), wait_event));
1152 wait_event = mono_wait_handle_get_handle ((MonoWaitHandle *) ares->handle);
1154 mono_monitor_exit ((MonoObject *) ares);
1155 WaitForSingleObjectEx (wait_event, INFINITE, TRUE);
1157 mono_monitor_exit ((MonoObject *) ares);
1160 ac = (ASyncCall *) ares->object_data;
1161 g_assert (ac != NULL);
1162 *exc = ac->msg->exc; /* FIXME: GC add write barrier */
1163 *out_args = ac->out_args;
1169 threadpool_kill_idle_threads (ThreadPool *tp)
1173 n = (gint) InterlockedCompareExchange (&tp->max_threads, 0, -1);
1176 MONO_SEM_POST (&tp->new_job);
1181 mono_thread_pool_cleanup (void)
1183 if (async_tp.pool_status == 1 && InterlockedCompareExchange (&async_tp.pool_status, 2, 1) == 2)
1186 InterlockedExchange (&async_io_tp.pool_status, 2);
1187 MONO_SEM_WAIT (&async_tp.lock);
1188 threadpool_free_queue (&async_tp);
1189 threadpool_kill_idle_threads (&async_tp);
1190 MONO_SEM_POST (&async_tp.lock);
1192 socket_io_cleanup (&socket_io_data); /* Empty when DISABLE_SOCKETS is defined */
1193 MONO_SEM_WAIT (&async_io_tp.lock);
1194 threadpool_free_queue (&async_io_tp);
1195 threadpool_kill_idle_threads (&async_io_tp);
1196 MONO_SEM_POST (&async_io_tp.lock);
1197 MONO_SEM_DESTROY (&async_io_tp.new_job);
1199 EnterCriticalSection (&wsqs_lock);
1200 mono_wsq_cleanup ();
1202 g_ptr_array_free (wsqs, TRUE);
1204 LeaveCriticalSection (&wsqs_lock);
1205 MONO_SEM_DESTROY (&async_tp.new_job);
1208 /* Caller must enter &tp->lock */
1210 dequeue_job_nolock (ThreadPool *tp)
1218 if (mono_runtime_is_shutting_down ())
1220 if (!list || tp->head == tp->tail)
1223 array = (MonoArray *) mono_mlist_get_data (list);
1224 ar = mono_array_get (array, MonoObject *, tp->head % QUEUE_LENGTH);
1225 mono_array_set (array, MonoObject *, tp->head % QUEUE_LENGTH, NULL);
1227 if ((tp->head % QUEUE_LENGTH) == 0) {
1229 tp->first = mono_mlist_next (list);
1230 if (tp->first == NULL)
1232 if (mono_mlist_length (tp->unused) < 20) {
1233 /* reuse this chunk */
1234 tp->unused = mono_mlist_set_next (list, tp->unused);
1236 tp->head -= QUEUE_LENGTH;
1237 tp->tail -= QUEUE_LENGTH;
1240 } while (ar == NULL);
1244 /* Call after entering &tp->lock */
1246 threadpool_start_thread (ThreadPool *tp)
1250 while ((n = tp->nthreads) < tp->max_threads) {
1251 if (InterlockedCompareExchange (&tp->nthreads, n + 1, n) == n) {
1252 mono_perfcounter_update_value (tp->pc_nthreads, TRUE, 1);
1253 mono_thread_create_internal (mono_get_root_domain (), tp->async_invoke, tp, TRUE);
1262 pulse_on_new_job (ThreadPool *tp)
1265 MONO_SEM_POST (&tp->new_job);
1269 icall_append_job (MonoObject *ar)
1271 threadpool_append_job (&async_tp, ar);
1275 threadpool_append_job (ThreadPool *tp, MonoObject *ar)
1277 threadpool_append_jobs (tp, &ar, 1);
1281 create_or_reuse_list (ThreadPool *tp)
1289 tp->unused = mono_mlist_next (list);
1290 mono_mlist_set_next (list, NULL);
1291 //TP_DEBUG (tp->nodes_reused++);
1293 array = mono_array_new_cached (mono_get_root_domain (), mono_defaults.object_class, QUEUE_LENGTH);
1294 list = mono_mlist_alloc ((MonoObject *) array);
1295 //TP_DEBUG (tp->nodes_created++);
1301 threadpool_append_jobs (ThreadPool *tp, MonoObject **jobs, gint njobs)
1307 gboolean lock_taken = FALSE; /* We won't take the lock when the local queue is used */
1309 if (mono_runtime_is_shutting_down ())
1312 if (tp->pool_status == 0 && InterlockedCompareExchange (&tp->pool_status, 1, 0) == 0)
1313 mono_thread_create_internal (mono_get_root_domain (), threadpool_start_idle_threads, tp, TRUE);
1315 for (i = 0; i < njobs; i++) {
1318 continue; /* Might happen when cleaning domain jobs */
1320 MonoAsyncResult *o = (MonoAsyncResult *) ar;
1321 o->add_time = mono_100ns_ticks ();
1323 threadpool_jobs_inc (ar);
1324 mono_perfcounter_update_value (tp->pc_nitems, TRUE, 1);
1325 if (!tp->is_io && mono_wsq_local_push (ar))
1329 MONO_SEM_WAIT (&tp->lock);
1332 if ((tp->tail % QUEUE_LENGTH) == 0) {
1333 list = create_or_reuse_list (tp);
1334 if (tp->last != NULL)
1335 mono_mlist_set_next (tp->last, list);
1337 if (tp->first == NULL)
1338 tp->first = tp->last;
1341 array = (MonoArray *) mono_mlist_get_data (tp->last);
1342 mono_array_setref (array, tp->tail % QUEUE_LENGTH, ar);
1346 MONO_SEM_POST (&tp->lock);
1347 for (i = 0; i < MIN(njobs, tp->max_threads); i++)
1348 pulse_on_new_job (tp);
1349 if (tp->waiting == 0)
1350 threadpool_start_thread (tp);
1354 threadpool_clear_queue (ThreadPool *tp, MonoDomain *domain)
1363 MONO_SEM_WAIT (&tp->lock);
1364 current = tp->first;
1366 array = (MonoArray *) mono_mlist_get_data (current);
1367 for (i = 0; i < QUEUE_LENGTH; i++) {
1368 obj = mono_array_get (array, MonoObject*, i);
1369 if (obj != NULL && obj->vtable->domain == domain) {
1371 mono_array_setref (array, i, NULL);
1374 current = mono_mlist_next (current);
1377 if (!domain_count) {
1378 MONO_SEM_POST (&tp->lock);
1382 current = tp->first;
1387 MONO_SEM_POST (&tp->lock);
1388 /* Re-add everything but the nullified elements */
1390 array = (MonoArray *) mono_mlist_get_data (current);
1391 threadpool_append_jobs (tp, mono_array_addr (array, MonoObject *, 0), QUEUE_LENGTH);
1392 memset (mono_array_addr (array, MonoObject *, 0), 0, sizeof (MonoObject *) * QUEUE_LENGTH);
1393 current = mono_mlist_next (current);
1398 * Clean up the threadpool of all domain jobs.
1399 * Can only be called as part of the domain unloading process as
1400 * it will wait for all jobs to be visible to the interruption code.
1403 mono_thread_pool_remove_domain_jobs (MonoDomain *domain, int timeout)
1407 guint32 start_time = 0;
1409 g_assert (domain->state == MONO_APPDOMAIN_UNLOADING);
1411 threadpool_clear_queue (&async_tp, domain);
1412 threadpool_clear_queue (&async_io_tp, domain);
1415 * There might be some threads out that could be about to execute stuff from the given domain.
1416 * We avoid that by setting up a semaphore to be pulsed by the thread that reaches zero.
1418 sem_handle = CreateSemaphore (NULL, 0, 1, NULL);
1420 domain->cleanup_semaphore = sem_handle;
1422 * The memory barrier here is required to have global ordering between assigning to cleanup_semaphone
1423 * and reading threadpool_jobs.
1424 * Otherwise this thread could read a stale version of threadpool_jobs and wait forever.
1426 mono_memory_write_barrier ();
1428 if (domain->threadpool_jobs && timeout != -1)
1429 start_time = mono_msec_ticks ();
1430 while (domain->threadpool_jobs) {
1431 WaitForSingleObject (sem_handle, timeout);
1432 if (timeout != -1 && (mono_msec_ticks () - start_time) > timeout) {
1438 domain->cleanup_semaphore = NULL;
1439 CloseHandle (sem_handle);
1444 threadpool_free_queue (ThreadPool *tp)
1446 tp->head = tp->tail = 0;
1452 mono_thread_pool_is_queue_array (MonoArray *o)
1456 // FIXME: need some fix in sgen code.
1457 // There are roots at: async*tp.unused (MonoMList) and wsqs [n]->queue (MonoArray)
1458 return obj == async_tp.first || obj == async_io_tp.first;
1462 add_wsq (MonoWSQ *wsq)
1469 EnterCriticalSection (&wsqs_lock);
1471 LeaveCriticalSection (&wsqs_lock);
1474 for (i = 0; i < wsqs->len; i++) {
1475 if (g_ptr_array_index (wsqs, i) == NULL) {
1476 wsqs->pdata [i] = wsq;
1477 LeaveCriticalSection (&wsqs_lock);
1481 g_ptr_array_add (wsqs, wsq);
1482 LeaveCriticalSection (&wsqs_lock);
1486 remove_wsq (MonoWSQ *wsq)
1493 EnterCriticalSection (&wsqs_lock);
1495 LeaveCriticalSection (&wsqs_lock);
1498 for (i = 0; i < wsqs->len; i++) {
1499 if (g_ptr_array_index (wsqs, i) == wsq) {
1500 wsqs->pdata [i] = NULL;
1501 LeaveCriticalSection (&wsqs_lock);
1505 /* Should not happen */
1506 LeaveCriticalSection (&wsqs_lock);
1510 try_steal (gpointer *data, gboolean retry)
1515 if (wsqs == NULL || data == NULL || *data != NULL)
1520 if (mono_runtime_is_shutting_down ())
1522 for (i = 0; wsqs != NULL && i < wsqs->len; i++) {
1523 if (mono_runtime_is_shutting_down ()) {
1526 mono_wsq_try_steal (wsqs->pdata [i], data, ms);
1527 if (*data != NULL) {
1532 } while (retry && ms < 11);
1536 dequeue_or_steal (ThreadPool *tp, gpointer *data)
1538 if (mono_runtime_is_shutting_down ())
1540 TP_DEBUG ("Dequeue");
1541 MONO_SEM_WAIT (&tp->lock);
1542 *data = dequeue_job_nolock (tp);
1543 MONO_SEM_POST (&tp->lock);
1544 if (!tp->is_io && !*data)
1545 try_steal (data, FALSE);
1546 return (*data != NULL);
1550 process_idle_times (ThreadPool *tp, gint64 t)
1554 gboolean compute_avg;
1558 if (tp->ignore_times)
1561 compute_avg = FALSE;
1562 ticks = mono_100ns_ticks ();
1564 SPIN_LOCK (tp->sp_lock);
1565 if (tp->ignore_times) {
1566 SPIN_UNLOCK (tp->sp_lock);
1571 if (tp->last_check == 0)
1572 tp->last_check = ticks;
1573 else if ((ticks - tp->last_check) > 5000000) {
1574 tp->ignore_times = 1;
1577 SPIN_UNLOCK (tp->sp_lock);
1582 //printf ("Items: %d Time elapsed: %.3fs\n", tp->n_sum, (ticks - tp->last_check) / 10000.0);
1584 avg = tp->time_sum / tp->n_sum;
1585 if (tp->averages [1] == 0) {
1586 tp->averages [1] = avg;
1588 per1 = ((100 * (ABS (avg - tp->averages [1]))) / tp->averages [1]);
1590 if (avg > tp->averages [1]) {
1591 if (tp->averages [1] < tp->averages [0]) {
1596 } else if (avg < tp->averages [1] && tp->averages [1] < tp->averages [0]) {
1601 min = tp->min_threads;
1603 if ((n - min) < min && tp->busy_threads == n)
1607 if (new_threads != 0) {
1608 printf ("n: %d per1: %lld avg=%lld avg1=%lld avg0=%lld\n", new_threads, per1, avg, tp->averages [1], tp->averages [0]);
1615 tp->last_check = mono_100ns_ticks ();
1617 tp->averages [0] = tp->averages [1];
1618 tp->averages [1] = avg;
1619 tp->ignore_times = 0;
1621 if (tp->waiting == 0 && new_threads == 1) {
1622 threadpool_start_thread (tp);
1623 } else if (new_threads == -1) {
1624 if (tp->destroy_thread == 0 && InterlockedCompareExchange (&tp->destroy_thread, 1, 0) == 0)
1625 pulse_on_new_job (tp);
1630 should_i_die (ThreadPool *tp)
1632 gboolean result = FALSE;
1633 if (tp->destroy_thread == 1 && InterlockedCompareExchange (&tp->destroy_thread, 0, 1) == 1)
1634 result = (tp->nthreads > tp->min_threads);
1639 async_invoke_thread (gpointer data)
1642 MonoInternalThread *thread;
1650 wsq = mono_wsq_create ();
1654 thread = mono_thread_internal_current ();
1656 tp_start_func (tp_hooks_user_data);
1659 MonoAsyncResult *ar;
1660 gboolean is_io_task;
1663 ar = (MonoAsyncResult *) data;
1665 #ifndef DISABLE_SOCKETS
1666 is_io_task = (strcmp (((MonoObject *) data)->vtable->klass->name, "AsyncResult"));
1668 MonoSocketAsyncResult *state = (MonoSocketAsyncResult *) data;
1670 switch (state->operation) {
1671 case AIO_OP_RECEIVE:
1672 state->total = ICALL_RECV (state);
1675 state->total = ICALL_SEND (state);
1681 /* worker threads invokes methods in different domains,
1682 * so we need to set the right domain here */
1683 domain = ((MonoObject *)ar)->vtable->domain;
1686 if (mono_domain_is_unloading (domain) || mono_runtime_is_shutting_down ()) {
1687 threadpool_jobs_dec ((MonoObject *)ar);
1690 InterlockedDecrement (&tp->busy_threads);
1692 mono_thread_push_appdomain_ref (domain);
1693 if (threadpool_jobs_dec ((MonoObject *)ar)) {
1696 mono_thread_pop_appdomain_ref ();
1700 if (mono_domain_set (domain, FALSE)) {
1701 /* ASyncCall *ac; */
1703 if (tp_item_begin_func)
1704 tp_item_begin_func (tp_item_user_data);
1707 process_idle_times (tp, ar->add_time);
1708 /*FIXME: Do something with the exception returned? */
1709 mono_async_invoke (tp, ar);
1710 if (tp_item_end_func)
1711 tp_item_end_func (tp_item_user_data);
1713 ac = (ASyncCall *) ar->object_data;
1714 if (ac->msg->exc != NULL)
1715 mono_unhandled_exception (ac->msg->exc);
1717 mono_domain_set (mono_get_root_domain (), TRUE);
1719 mono_thread_pop_appdomain_ref ();
1720 InterlockedDecrement (&tp->busy_threads);
1721 /* If the callee changes the background status, set it back to TRUE */
1722 if (!mono_thread_test_state (thread , ThreadState_Background))
1723 ves_icall_System_Threading_Thread_SetState (thread, ThreadState_Background);
1729 must_die = should_i_die (tp);
1730 TP_DEBUG ("Trying to get a job");
1731 if (!must_die && (tp->is_io || !mono_wsq_local_pop (&data)))
1732 dequeue_or_steal (tp, &data);
1733 TP_DEBUG ("Done trying to get a job %p", data);
1735 while (!must_die && !data) {
1738 TP_DEBUG ("Waiting");
1739 InterlockedIncrement (&tp->waiting);
1740 while ((res = mono_sem_wait (&tp->new_job, TRUE)) == -1 && errno == EINTR) {
1741 if (mono_runtime_is_shutting_down ())
1743 if (THREAD_WANTS_A_BREAK (thread))
1744 mono_thread_interruption_checkpoint ();
1746 TP_DEBUG ("Done waiting");
1747 InterlockedDecrement (&tp->waiting);
1748 if (mono_runtime_is_shutting_down ())
1750 must_die = should_i_die (tp);
1751 dequeue_or_steal (tp, &data);
1759 down = mono_runtime_is_shutting_down ();
1760 if (!down && nt <= tp->min_threads)
1762 if (down || InterlockedCompareExchange (&tp->nthreads, nt - 1, nt) == nt) {
1763 mono_perfcounter_update_value (tp->pc_nthreads, TRUE, -1);
1767 mono_wsq_destroy (wsq);
1770 tp_finish_func (tp_hooks_user_data);
1776 InterlockedIncrement (&tp->busy_threads);
1779 g_assert_not_reached ();
1783 ves_icall_System_Threading_ThreadPool_GetAvailableThreads (gint *workerThreads, gint *completionPortThreads)
1785 *workerThreads = async_tp.max_threads - async_tp.busy_threads;
1786 *completionPortThreads = async_io_tp.max_threads - async_io_tp.busy_threads;
1790 ves_icall_System_Threading_ThreadPool_GetMaxThreads (gint *workerThreads, gint *completionPortThreads)
1792 *workerThreads = async_tp.max_threads;
1793 *completionPortThreads = async_io_tp.max_threads;
1797 ves_icall_System_Threading_ThreadPool_GetMinThreads (gint *workerThreads, gint *completionPortThreads)
1799 *workerThreads = async_tp.min_threads;
1800 *completionPortThreads = async_io_tp.min_threads;
1804 ves_icall_System_Threading_ThreadPool_SetMinThreads (gint workerThreads, gint completionPortThreads)
1807 gint max_io_threads;
1809 max_threads = async_tp.max_threads;
1810 if (workerThreads <= 0 || workerThreads > max_threads)
1813 max_io_threads = async_io_tp.max_threads;
1814 if (completionPortThreads <= 0 || completionPortThreads > max_io_threads)
1817 InterlockedExchange (&async_tp.min_threads, workerThreads);
1818 InterlockedExchange (&async_io_tp.min_threads, completionPortThreads);
1819 if (workerThreads > async_tp.nthreads)
1820 mono_thread_create_internal (mono_get_root_domain (), threadpool_start_idle_threads, &async_tp, TRUE);
1821 if (completionPortThreads > async_io_tp.nthreads)
1822 mono_thread_create_internal (mono_get_root_domain (), threadpool_start_idle_threads, &async_io_tp, TRUE);
1827 ves_icall_System_Threading_ThreadPool_SetMaxThreads (gint workerThreads, gint completionPortThreads)
1830 gint min_io_threads;
1833 cpu_count = mono_cpu_count ();
1834 min_threads = InterlockedCompareExchange (&async_tp.min_threads, -1, -1);
1835 if (workerThreads < min_threads || workerThreads < cpu_count)
1838 /* We don't really have the concept of completion ports. Do we care here? */
1839 min_io_threads = InterlockedCompareExchange (&async_io_tp.min_threads, -1, -1);
1840 if (completionPortThreads < min_io_threads || completionPortThreads < cpu_count)
1843 InterlockedExchange (&async_tp.max_threads, workerThreads);
1844 InterlockedExchange (&async_io_tp.max_threads, completionPortThreads);
1849 * mono_install_threadpool_thread_hooks
1850 * @start_func: the function to be called right after a new threadpool thread is created. Can be NULL.
1851 * @finish_func: the function to be called right before a thredpool thread is exiting. Can be NULL.
1852 * @user_data: argument passed to @start_func and @finish_func.
1854 * @start_fun will be called right after a threadpool thread is created and @finish_func right before a threadpool thread exits.
1855 * The calls will be made from the thread itself.
1858 mono_install_threadpool_thread_hooks (MonoThreadPoolFunc start_func, MonoThreadPoolFunc finish_func, gpointer user_data)
1860 tp_start_func = start_func;
1861 tp_finish_func = finish_func;
1862 tp_hooks_user_data = user_data;
1866 * mono_install_threadpool_item_hooks
1867 * @begin_func: the function to be called before a threadpool work item processing starts.
1868 * @end_func: the function to be called after a threadpool work item is finished.
1869 * @user_data: argument passed to @begin_func and @end_func.
1871 * The calls will be made from the thread itself and from the same AppDomain
1872 * where the work item was executed.
1876 mono_install_threadpool_item_hooks (MonoThreadPoolItemFunc begin_func, MonoThreadPoolItemFunc end_func, gpointer user_data)
1878 tp_item_begin_func = begin_func;
1879 tp_item_end_func = end_func;
1880 tp_item_user_data = user_data;