+/*
+ * threads.c: Thread handles
+ *
+ * Author:
+ * Dick Porter (dick@ximian.com)
+ *
+ * (C) 2002 Ximian, Inc.
+ */
+
#include <config.h>
+#include <stdio.h>
#include <glib.h>
#include <string.h>
#include <pthread.h>
+#include <signal.h>
#include <sched.h>
#include <sys/time.h>
#include <errno.h>
+#include <sys/types.h>
+#include <unistd.h>
-#include "mono/io-layer/wapi.h"
-#include "wapi-private.h"
-#include "timed-thread.h"
-#include "wait-private.h"
-#include "handles-private.h"
-#include "misc-private.h"
+#include <mono/io-layer/wapi.h>
+#include <mono/io-layer/wapi-private.h>
+#include <mono/io-layer/timed-thread.h>
+#include <mono/io-layer/handles-private.h>
+#include <mono/io-layer/misc-private.h>
+#include <mono/io-layer/mono-mutex.h>
+#include <mono/io-layer/thread-private.h>
+#include <mono/io-layer/mono-spinlock.h>
+#include <mono/io-layer/mutex-private.h>
-#include "pthread-compat.h"
-
-#define DEBUG
-
-typedef enum {
- THREAD_STATE_START,
- THREAD_STATE_EXITED,
-} WapiThreadState;
+#if HAVE_VALGRIND_MEMCHECK_H
+#include <valgrind/memcheck.h>
+#endif
-struct _WapiHandle_thread
-{
- WapiHandle handle;
- WapiThreadState state;
- TimedThread *thread;
- guint32 exitstatus;
-};
+#undef DEBUG
+#undef TLS_DEBUG
-static pthread_mutex_t thread_signal_mutex = PTHREAD_MUTEX_INITIALIZER;
-static pthread_cond_t thread_signal_cond = PTHREAD_COND_INITIALIZER;
/* Hash threads with tids. I thought of using TLS for this, but that
* would have to set the data in the new thread, which is more hassle
*/
-static pthread_once_t thread_hash_once = PTHREAD_ONCE_INIT;
-static pthread_mutex_t thread_hash_mutex = PTHREAD_MUTEX_INITIALIZER;
+static mono_once_t thread_hash_once = MONO_ONCE_INIT;
+static mono_mutex_t thread_hash_mutex = MONO_MUTEX_INITIALIZER;
static GHashTable *thread_hash=NULL;
-static void thread_close(WapiHandle *handle);
-static gboolean thread_wait(WapiHandle *handle, guint32 ms);
-static guint32 thread_wait_multiple(gpointer data);
+static void thread_close (gpointer handle, gpointer data);
+static gboolean thread_own (gpointer handle);
-static struct _WapiHandleOps thread_ops = {
+struct _WapiHandleOps _wapi_thread_ops = {
thread_close, /* close */
- NULL, /* getfiletype */
- NULL, /* readfile */
- NULL, /* writefile */
- NULL, /* seek */
- NULL, /* setendoffile */
- NULL, /* getfilesize */
- thread_wait, /* wait */
- thread_wait_multiple, /* wait_multiple */
+ NULL, /* signal */
+ thread_own, /* own */
+ NULL, /* is_owned */
};
-static void thread_close(WapiHandle *handle)
-{
- struct _WapiHandle_thread *thread_handle=(struct _WapiHandle_thread *)handle;
-
-#ifdef DEBUG
- g_message(G_GNUC_PRETTY_FUNCTION
- ": closing thread handle %p with thread %p id %ld",
- thread_handle, thread_handle->thread,
- thread_handle->thread->id);
-#endif
+static mono_once_t thread_ops_once=MONO_ONCE_INIT;
- g_free(thread_handle->thread);
-}
+#ifdef WITH_INCLUDED_LIBGC
+static void gc_init (void);
+#endif
-static gboolean thread_wait(WapiHandle *handle, guint32 ms)
+static void thread_ops_init (void)
{
- struct _WapiHandle_thread *thread_handle=(struct _WapiHandle_thread *)handle;
- int ret;
-
- if(handle->signalled) {
- /* Already signalled, so return straight away */
-#ifdef DEBUG
- g_message(G_GNUC_PRETTY_FUNCTION ": thread handle %p already signalled, returning now", handle);
+ _wapi_handle_register_capabilities (WAPI_HANDLE_THREAD,
+ WAPI_HANDLE_CAP_WAIT);
+
+#ifdef WITH_INCLUDED_LIBGC
+ gc_init ();
#endif
+}
- return(TRUE);
- }
+static void thread_close (gpointer handle, gpointer data)
+{
+ struct _WapiHandle_thread *thread_handle = (struct _WapiHandle_thread *)data;
#ifdef DEBUG
- g_message(G_GNUC_PRETTY_FUNCTION
- ": waiting for %d ms for thread handle %p with id %ld", ms,
- thread_handle, thread_handle->thread->id);
+ g_message ("%s: closing thread handle %p", __func__, handle);
#endif
- if(ms==INFINITE) {
- ret=_wapi_timed_thread_join(thread_handle->thread, NULL, NULL);
- } else {
- struct timespec timeout;
-
- _wapi_calc_timeout(&timeout, ms);
-
- ret=_wapi_timed_thread_join(thread_handle->thread, &timeout,
- NULL);
- }
-
- if(ret==0) {
- /* Thread joined */
- return(TRUE);
- } else {
- /* ret might be ETIMEDOUT for timeout, or other for error */
- return(FALSE);
- }
+ g_ptr_array_free (thread_handle->owned_mutexes, TRUE);
}
-static guint32 thread_wait_multiple(gpointer data)
+static gboolean thread_own (gpointer handle)
{
- WaitQueueItem *item=(WaitQueueItem *)data;
- int ret;
- guint32 numhandles, count;
- struct timespec timeout;
-
- numhandles=item->handles[WAPI_HANDLE_THREAD]->len;
+ struct _WapiHandle_thread *thread_handle;
+ gboolean ok;
#ifdef DEBUG
- g_message(G_GNUC_PRETTY_FUNCTION
- ": waiting on %d thread handles for %d ms", numhandles,
- item->timeout);
-#endif
-
- /* First, check if any of the handles are already
- * signalled. If waitall is specified we only return if all
- * handles have been signalled.
- */
- count=_wapi_handle_count_signalled(item, WAPI_HANDLE_THREAD);
-
-#ifdef DEBUG
- g_message(G_GNUC_PRETTY_FUNCTION
- ": Preliminary check found %d handles signalled", count);
+ g_message ("%s: owning thread handle %p", __func__, handle);
#endif
- if((item->waitall==TRUE && count==numhandles) ||
- (item->waitall==FALSE && count>0)) {
- goto success;
+ ok = _wapi_lookup_handle (handle, WAPI_HANDLE_THREAD,
+ (gpointer *)&thread_handle);
+ if (ok == FALSE) {
+ g_warning ("%s: error looking up thread handle %p", __func__,
+ handle);
+ return(FALSE);
}
- /* OK, we need to wait for some */
- if(item->timeout!=INFINITE) {
- _wapi_calc_timeout(&timeout, item->timeout);
+ if (thread_handle->joined == FALSE) {
+ _wapi_timed_thread_join (thread_handle->thread, NULL, NULL);
+ thread_handle->joined = TRUE;
}
-
- /* We can restart from here without resetting the timeout,
- * because it is calculated from absolute time, not an offset
- */
-again:
- pthread_mutex_lock(&thread_signal_mutex);
- if(item->timeout==INFINITE) {
- ret=pthread_cond_wait(&thread_signal_cond,
- &thread_signal_mutex);
- } else {
- ret=pthread_cond_timedwait(&thread_signal_cond,
- &thread_signal_mutex,
- &timeout);
- }
- pthread_mutex_unlock(&thread_signal_mutex);
-
- if(ret==ETIMEDOUT) {
- /* Check signalled state here, just in case a thread
- * exited between the first check and the cond wait.
- * We return the number of signalled handles, which
- * may be fewer than the total.
- */
-#ifdef DEBUG
- g_message(G_GNUC_PRETTY_FUNCTION ": Wait timed out");
-#endif
- count=_wapi_handle_count_signalled(item, WAPI_HANDLE_THREAD);
- goto success;
+ return(TRUE);
+}
+
+static void thread_exit(guint32 exitstatus, gpointer handle)
+{
+ struct _WapiHandle_thread *thread_handle;
+ gboolean ok;
+ int thr_ret;
+ int i;
+
+ pthread_cleanup_push ((void(*)(void *))_wapi_handle_unlock_handle,
+ handle);
+ thr_ret = _wapi_handle_lock_handle (handle);
+ g_assert (thr_ret == 0);
+
+ ok = _wapi_lookup_handle (handle, WAPI_HANDLE_THREAD,
+ (gpointer *)&thread_handle);
+ if (ok == FALSE) {
+ g_warning ("%s: error looking up thread handle %p", __func__,
+ handle);
+ return;
}
-#ifdef DEBUG
- g_message(G_GNUC_PRETTY_FUNCTION ": Thread exited, checking status");
-#endif
-
- /* Another thread exited, so see if it was one we are
- * interested in
- */
- count=_wapi_handle_count_signalled(item, WAPI_HANDLE_THREAD);
-
-#ifdef DEBUG
- g_message(G_GNUC_PRETTY_FUNCTION
- ": Check after thread exit found %d handles signalled",
- count);
-#endif
-
- if((item->waitall==TRUE && count==numhandles) ||
- (item->waitall==FALSE && count>0)) {
- goto success;
+ for (i = 0; i < thread_handle->owned_mutexes->len; i++) {
+ _wapi_mutex_abandon (g_ptr_array_index (thread_handle->owned_mutexes, i), getpid (), thread_handle->thread->id);
}
- /* Either we have waitall set with more handles to wait for,
- * or the thread that exited wasn't interesting to us
- */
#ifdef DEBUG
- g_message(G_GNUC_PRETTY_FUNCTION ": Waiting a bit longer");
+ g_message ("%s: Recording thread handle %p exit status", __func__,
+ handle);
#endif
-
- goto again;
-
-success:
- item->waited[WAPI_HANDLE_THREAD]=TRUE;
- item->waitcount[WAPI_HANDLE_THREAD]=count;
- return(count);
-}
+ thread_handle->exitstatus = exitstatus;
+ thread_handle->state = THREAD_STATE_EXITED;
-static void thread_exit(guint32 exitstatus, gpointer userdata)
-{
- struct _WapiHandle_thread *thread_handle=(struct _WapiHandle_thread *)userdata;
+ _wapi_handle_set_signal_state (handle, TRUE, TRUE);
- thread_handle->exitstatus=exitstatus;
- thread_handle->state=THREAD_STATE_EXITED;
- thread_handle->handle.signalled=TRUE;
+ thr_ret = _wapi_handle_unlock_handle (handle);
+ g_assert (thr_ret == 0);
+ pthread_cleanup_pop (0);
#ifdef DEBUG
- g_message(G_GNUC_PRETTY_FUNCTION
- ": Recording thread handle %p id %ld status as %d",
- thread_handle, thread_handle->thread->id, exitstatus);
+ g_message("%s: Recording thread handle %p id %ld status as %d",
+ __func__, handle, thread_handle->thread->id, exitstatus);
#endif
/* Remove this thread from the hash */
- pthread_mutex_lock(&thread_hash_mutex);
- g_hash_table_remove(thread_hash, &thread_handle->thread->id);
- pthread_mutex_unlock(&thread_hash_mutex);
-
- /* Signal any thread waiting on thread exit */
- pthread_mutex_lock(&thread_signal_mutex);
- pthread_cond_broadcast(&thread_signal_cond);
- pthread_mutex_unlock(&thread_signal_mutex);
+ pthread_cleanup_push ((void(*)(void *))mono_mutex_unlock_in_cleanup,
+ (void *)&thread_hash_mutex);
+ thr_ret = mono_mutex_lock(&thread_hash_mutex);
+ g_assert (thr_ret == 0);
+
+ g_hash_table_remove (thread_hash, (gpointer)(thread_handle->thread->id));
+
+ thr_ret = mono_mutex_unlock(&thread_hash_mutex);
+ g_assert (thr_ret == 0);
+ pthread_cleanup_pop (0);
+
+ /* The thread is no longer active, so unref it */
+ _wapi_handle_unref (handle);
}
static void thread_hash_init(void)
{
- thread_hash=g_hash_table_new(g_int_hash, g_int_equal);
+ thread_hash = g_hash_table_new (NULL, NULL);
}
/**
* @create: If 0, the new thread is ready to run immediately. If
* %CREATE_SUSPENDED, the new thread will be in the suspended state,
* requiring a ResumeThread() call to continue running.
- * @tid: If non-NULL, the ID of the new thread is stored here.
+ * @tid: If non-NULL, the ID of the new thread is stored here. NB
+ * this is defined as a DWORD (ie 32bit) in the MS API, but we need to
+ * cope with 64 bit IDs for s390x and amd64.
*
* Creates a new threading handle.
*
* Return value: a new handle, or NULL
*/
-WapiHandle *CreateThread(WapiSecurityAttributes *security G_GNUC_UNUSED, guint32 stacksize G_GNUC_UNUSED,
- WapiThreadStart start, gpointer param, guint32 create G_GNUC_UNUSED,
- guint32 *tid)
+gpointer CreateThread(WapiSecurityAttributes *security G_GNUC_UNUSED, guint32 stacksize,
+ WapiThreadStart start, gpointer param, guint32 create,
+ gsize *tid)
{
- struct _WapiHandle_thread *thread_handle;
- WapiHandle *handle;
+ struct _WapiHandle_thread thread_handle = {0}, *thread_handle_p;
+ pthread_attr_t attr;
+ gpointer handle;
+ gboolean ok;
int ret;
+ int thr_ret;
+ int i, unrefs = 0;
+ gpointer ct_ret = NULL;
- pthread_once(&thread_hash_once, thread_hash_init);
+ mono_once (&thread_hash_once, thread_hash_init);
+ mono_once (&thread_ops_once, thread_ops_init);
- if(start==NULL) {
+ if (start == NULL) {
return(NULL);
}
+
+ thread_handle.state = THREAD_STATE_START;
+ thread_handle.owner_pid = getpid ();
+ thread_handle.owned_mutexes = g_ptr_array_new ();
- thread_handle=(struct _WapiHandle_thread *)g_new0(struct _WapiHandle_thread, 1);
- thread_handle->state=THREAD_STATE_START;
+ handle = _wapi_handle_new (WAPI_HANDLE_THREAD, &thread_handle);
+ if (handle == _WAPI_HANDLE_INVALID) {
+ g_warning ("%s: error creating thread handle", __func__);
+ SetLastError (ERROR_GEN_FAILURE);
+
+ return (NULL);
+ }
+
+ pthread_cleanup_push ((void(*)(void *))_wapi_handle_unlock_handle,
+ handle);
+ thr_ret = _wapi_handle_lock_handle (handle);
+ g_assert (thr_ret == 0);
+
+ ok = _wapi_lookup_handle (handle, WAPI_HANDLE_THREAD,
+ (gpointer *)&thread_handle_p);
+ if (ok == FALSE) {
+ g_warning ("%s: error looking up thread handle %p", __func__,
+ handle);
+ SetLastError (ERROR_GEN_FAILURE);
+
+ goto cleanup;
+ }
+
+ /* Hold a reference while the thread is active, because we use
+ * the handle to store thread exit information
+ */
+ _wapi_handle_ref (handle);
/* Lock around the thread create, so that the new thread cant
* race us to look up the thread handle in GetCurrentThread()
*/
- pthread_mutex_lock(&thread_hash_mutex);
+ pthread_cleanup_push ((void(*)(void *))mono_mutex_unlock_in_cleanup,
+ (void *)&thread_hash_mutex);
+ thr_ret = mono_mutex_lock(&thread_hash_mutex);
+ g_assert (thr_ret == 0);
- ret=_wapi_timed_thread_create(&thread_handle->thread, NULL, start,
- thread_exit, param, thread_handle);
- if(ret!=0) {
-#ifdef DEBUG
- g_message(G_GNUC_PRETTY_FUNCTION ": Thread create error: %s",
- strerror(ret));
+ /* Set a 2M stack size. This is the default on Linux, but BSD
+ * needs it. (The original bug report from Martin Dvorak <md@9ll.cz>
+ * set the size to 2M-4k. I don't know why it's short by 4k, so
+ * I'm leaving it as 2M until I'm told differently.)
+ */
+ thr_ret = pthread_attr_init(&attr);
+ g_assert (thr_ret == 0);
+
+ /* defaults of 2Mb for 32bits and 4Mb for 64bits */
+ /* temporarily changed to use 1 MB: this allows more threads
+ * to be used, as well as using less virtual memory and so
+ * more is available for the GC heap.
+ */
+ if (stacksize == 0){
+#if HAVE_VALGRIND_MEMCHECK_H
+ if (RUNNING_ON_VALGRIND) {
+ stacksize = 1 << 20;
+ } else {
+ stacksize = (SIZEOF_VOID_P / 4) * 1024 * 1024;
+ }
+#else
+ stacksize = (SIZEOF_VOID_P / 4) * 1024 * 1024;
#endif
- pthread_mutex_unlock(&thread_hash_mutex);
- g_free(thread_handle);
- return(NULL);
}
- g_hash_table_insert(thread_hash, &thread_handle->thread->id,
- thread_handle);
- pthread_mutex_unlock(&thread_hash_mutex);
+#ifdef HAVE_PTHREAD_ATTR_SETSTACKSIZE
+ thr_ret = pthread_attr_setstacksize(&attr, stacksize);
+ g_assert (thr_ret == 0);
+#endif
- handle=(WapiHandle *)thread_handle;
- _WAPI_HANDLE_INIT(handle, WAPI_HANDLE_THREAD, thread_ops);
+ ret = _wapi_timed_thread_create (&thread_handle_p->thread, &attr,
+ create, start, thread_exit, param,
+ handle);
+ if (ret != 0) {
+#ifdef DEBUG
+ g_message ("%s: Thread create error: %s", __func__,
+ strerror(ret));
+#endif
+
+ /* Two, because of the reference we took above */
+ unrefs = 2;
+
+ goto thread_hash_cleanup;
+ }
+ ct_ret = handle;
+
+ g_hash_table_insert (thread_hash,
+ (gpointer)(thread_handle_p->thread->id),
+ handle);
#ifdef DEBUG
- g_message(G_GNUC_PRETTY_FUNCTION
- ": Started thread handle %p thread %p ID %ld", thread_handle,
- thread_handle->thread, thread_handle->thread->id);
+ g_message("%s: Started thread handle %p thread %p ID %ld", __func__,
+ handle, thread_handle_p->thread,
+ thread_handle_p->thread->id);
+#endif
+
+ if (tid != NULL) {
+#ifdef PTHREAD_POINTER_ID
+ /* Don't use GPOINTER_TO_UINT here, it can't cope with
+ * sizeof(void *) > sizeof(uint) when a cast to uint
+ * would overflow
+ */
+ *tid = (gsize)(thread_handle_p->thread->id);
+#else
+ *tid = thread_handle_p->thread->id;
#endif
+ }
+
+thread_hash_cleanup:
+ thr_ret = mono_mutex_unlock (&thread_hash_mutex);
+ g_assert (thr_ret == 0);
+ pthread_cleanup_pop (0);
+
+cleanup:
+ thr_ret = _wapi_handle_unlock_handle (handle);
+ g_assert (thr_ret == 0);
+ pthread_cleanup_pop (0);
+
+ /* Must not call _wapi_handle_unref() with the handle already
+ * locked
+ */
+ for (i = 0; i < unrefs; i++) {
+ _wapi_handle_unref (handle);
+ }
+
+ return(ct_ret);
+}
+
+gpointer _wapi_thread_handle_from_id (pthread_t tid)
+{
+ gpointer ret=NULL;
+ int thr_ret;
+
+ pthread_cleanup_push ((void(*)(void *))mono_mutex_unlock_in_cleanup,
+ (void *)&thread_hash_mutex);
+ thr_ret = mono_mutex_lock(&thread_hash_mutex);
+ g_assert (thr_ret == 0);
+
+ ret = g_hash_table_lookup (thread_hash, (gpointer)(tid));
+
+ thr_ret = mono_mutex_unlock(&thread_hash_mutex);
+ g_assert (thr_ret == 0);
+ pthread_cleanup_pop (0);
+
+ return(ret);
+}
+
+/* NB tid is 32bit in MS API, but we need 64bit on amd64 and s390x
+ * (and probably others)
+ */
+gpointer OpenThread (guint32 access G_GNUC_UNUSED, gboolean inherit G_GNUC_UNUSED, gsize tid)
+{
+ gpointer ret=NULL;
+
+ mono_once (&thread_hash_once, thread_hash_init);
+ mono_once (&thread_ops_once, thread_ops_init);
- if(tid!=NULL) {
- *tid=thread_handle->thread->id;
+#ifdef DEBUG
+ g_message ("%s: looking up thread %"G_GSIZE_FORMAT, __func__, tid);
+#endif
+
+ ret = _wapi_thread_handle_from_id ((pthread_t)tid);
+ if(ret!=NULL) {
+ _wapi_handle_ref (ret);
}
- return(handle);
+#ifdef DEBUG
+ g_message ("%s: returning thread handle %p", __func__, ret);
+#endif
+
+ return(ret);
}
/**
*
* Return value: %TRUE, or %FALSE on error.
*/
-gboolean GetExitCodeThread(WapiHandle *handle, guint32 *exitcode)
+gboolean GetExitCodeThread(gpointer handle, guint32 *exitcode)
{
- struct _WapiHandle_thread *thread_handle=(struct _WapiHandle_thread *)handle;
+ struct _WapiHandle_thread *thread_handle;
+ gboolean ok;
+
+ ok = _wapi_lookup_handle (handle, WAPI_HANDLE_THREAD,
+ (gpointer *)&thread_handle);
+ if (ok == FALSE) {
+ g_warning ("%s: error looking up thread handle %p", __func__,
+ handle);
+ return (FALSE);
+ }
#ifdef DEBUG
- g_message(G_GNUC_PRETTY_FUNCTION
- ": Finding exit status for thread handle %p id %ld", handle,
- thread_handle->thread->id);
+ g_message ("%s: Finding exit status for thread handle %p id %ld",
+ __func__, handle, thread_handle->thread->id);
#endif
- if(exitcode==NULL) {
+ if (exitcode == NULL) {
#ifdef DEBUG
- g_message(G_GNUC_PRETTY_FUNCTION
- ": Nowhere to store exit code");
+ g_message ("%s: Nowhere to store exit code", __func__);
#endif
return(FALSE);
}
- if(thread_handle->state!=THREAD_STATE_EXITED) {
+ if (thread_handle->state != THREAD_STATE_EXITED) {
#ifdef DEBUG
- g_message(G_GNUC_PRETTY_FUNCTION
- ": Thread still active (state %d, exited is %d)",
- thread_handle->state, THREAD_STATE_EXITED);
+ g_message ("%s: Thread still active (state %d, exited is %d)",
+ __func__, thread_handle->state,
+ THREAD_STATE_EXITED);
#endif
- *exitcode=STILL_ACTIVE;
+ *exitcode = STILL_ACTIVE;
return(TRUE);
}
- *exitcode=thread_handle->exitstatus;
+ *exitcode = thread_handle->exitstatus;
return(TRUE);
}
* Looks up the thread ID of the current thread. This ID can be
* passed to OpenThread() to create a new handle on this thread.
*
- * Return value: the thread ID.
+ * Return value: the thread ID. NB this is defined as DWORD (ie 32
+ * bit) in the MS API, but we need to cope with 64 bit IDs for s390x
+ * and amd64. This doesn't really break the API, it just embraces and
+ * extends it on 64bit platforms :)
*/
-guint32 GetCurrentThreadId(void)
+gsize GetCurrentThreadId(void)
{
- pthread_t tid=pthread_self();
+ pthread_t tid = pthread_self();
+#ifdef PTHREAD_POINTER_ID
+ /* Don't use GPOINTER_TO_UINT here, it can't cope with
+ * sizeof(void *) > sizeof(uint) when a cast to uint would
+ * overflow
+ */
+ return((gsize)tid);
+#else
return(tid);
+#endif
+}
+
+static gpointer thread_attach(gsize *tid)
+{
+ struct _WapiHandle_thread thread_handle = {0}, *thread_handle_p;
+ gpointer handle;
+ gboolean ok;
+ int ret;
+ int thr_ret;
+ int i, unrefs = 0;
+ gpointer ta_ret = NULL;
+
+ mono_once (&thread_hash_once, thread_hash_init);
+ mono_once (&thread_ops_once, thread_ops_init);
+
+ thread_handle.state = THREAD_STATE_START;
+ thread_handle.owner_pid = getpid ();
+ thread_handle.owned_mutexes = g_ptr_array_new ();
+
+ handle = _wapi_handle_new (WAPI_HANDLE_THREAD, &thread_handle);
+ if (handle == _WAPI_HANDLE_INVALID) {
+ g_warning ("%s: error creating thread handle", __func__);
+
+ SetLastError (ERROR_GEN_FAILURE);
+ return (NULL);
+ }
+
+ pthread_cleanup_push ((void(*)(void *))_wapi_handle_unlock_handle,
+ handle);
+ thr_ret = _wapi_handle_lock_handle (handle);
+ g_assert (thr_ret == 0);
+
+ ok = _wapi_lookup_handle (handle, WAPI_HANDLE_THREAD,
+ (gpointer *)&thread_handle_p);
+ if (ok == FALSE) {
+ g_warning ("%s: error looking up thread handle %p", __func__,
+ handle);
+
+ SetLastError (ERROR_GEN_FAILURE);
+ goto cleanup;
+ }
+
+ /* Hold a reference while the thread is active, because we use
+ * the handle to store thread exit information
+ */
+ _wapi_handle_ref (handle);
+
+ /* Lock around the thread create, so that the new thread cant
+ * race us to look up the thread handle in GetCurrentThread()
+ */
+ pthread_cleanup_push ((void(*)(void *))mono_mutex_unlock_in_cleanup,
+ (void *)&thread_hash_mutex);
+ thr_ret = mono_mutex_lock(&thread_hash_mutex);
+ g_assert (thr_ret == 0);
+
+ ret = _wapi_timed_thread_attach (&thread_handle_p->thread, thread_exit,
+ handle);
+ if (ret != 0) {
+#ifdef DEBUG
+ g_message ("%s: Thread attach error: %s", __func__,
+ strerror(ret));
+#endif
+
+ /* Two, because of the reference we took above */
+ unrefs = 2;
+
+ goto thread_hash_cleanup;
+ }
+ ta_ret = handle;
+
+ g_hash_table_insert (thread_hash,
+ (gpointer)(thread_handle_p->thread->id),
+ handle);
+
+#ifdef DEBUG
+ g_message("%s: Attached thread handle %p thread %p ID %ld", __func__,
+ handle, thread_handle_p->thread,
+ thread_handle_p->thread->id);
+#endif
+
+ if (tid != NULL) {
+#ifdef PTHREAD_POINTER_ID
+ /* Don't use GPOINTER_TO_UINT here, it can't cope with
+ * sizeof(void *) > sizeof(uint) when a cast to uint
+ * would overflow
+ */
+ *tid = (gsize)(thread_handle_p->thread->id);
+#else
+ *tid = thread_handle_p->thread->id;
+#endif
+ }
+
+thread_hash_cleanup:
+ thr_ret = mono_mutex_unlock (&thread_hash_mutex);
+ g_assert (thr_ret == 0);
+ pthread_cleanup_pop (0);
+
+cleanup:
+ thr_ret = _wapi_handle_unlock_handle (handle);
+ g_assert (thr_ret == 0);
+ pthread_cleanup_pop (0);
+
+ /* Must not call _wapi_handle_unref() with the handle already
+ * locked
+ */
+ for (i = 0; i < unrefs; i++) {
+ _wapi_handle_unref (handle);
+ }
+
+ return(ta_ret);
}
/**
* (Unknown whether Windows has a possible failure here. It may be
* necessary to implement the pseudohandle-constant behaviour).
*/
-WapiHandle *GetCurrentThread(void)
+gpointer GetCurrentThread(void)
{
- WapiHandle *ret=NULL;
- guint32 tid;
+ gpointer ret=NULL;
+ gsize tid;
- tid=GetCurrentThreadId();
+ mono_once(&thread_hash_once, thread_hash_init);
+ mono_once (&thread_ops_once, thread_ops_init);
- pthread_mutex_lock(&thread_hash_mutex);
-
- ret=g_hash_table_lookup(thread_hash, &tid);
-
- pthread_mutex_unlock(&thread_hash_mutex);
+ tid = GetCurrentThreadId();
+ ret = _wapi_thread_handle_from_id ((pthread_t)tid);
+ if (!ret) {
+ ret = thread_attach (NULL);
+ }
+
return(ret);
}
*
* Return value: the previous suspend count, or 0xFFFFFFFF on error.
*/
-guint32 ResumeThread(WapiHandle *handle G_GNUC_UNUSED)
+guint32 ResumeThread(gpointer handle)
{
+ struct _WapiHandle_thread *thread_handle;
+ gboolean ok;
+
+ ok = _wapi_lookup_handle (handle, WAPI_HANDLE_THREAD,
+ (gpointer *)&thread_handle);
+ if (ok == FALSE) {
+ g_warning ("%s: error looking up thread handle %p", __func__,
+ handle);
+
+ return (0xFFFFFFFF);
+ }
+
+ if (thread_handle->thread == NULL) {
+ return(0xFFFFFFFF);
+ }
+
+#ifdef WITH_INCLUDED_LIBGC
+ if (thread_handle->thread->suspend_count <= 1)
+ _wapi_timed_thread_resume (thread_handle->thread);
+
+ return (--thread_handle->thread->suspend_count));
+#else
+ /* This is still a kludge that only copes with starting a
+ * thread that was suspended on create, so don't bother with
+ * the suspend count crap yet
+ */
+ _wapi_timed_thread_resume (thread_handle->thread);
return(0xFFFFFFFF);
+#endif
}
/**
*
* Return value: the previous suspend count, or 0xFFFFFFFF on error.
*/
-guint32 SuspendThread(WapiHandle *handle G_GNUC_UNUSED)
+guint32 SuspendThread(gpointer handle)
{
+#ifdef WITH_INCLUDED_LIBGC
+ struct _WapiHandle_thread *thread_handle;
+ gpointer current;
+ gboolean ok;
+
+ current = GetCurrentThread ();
+ ok = _wapi_lookup_handle (handle, WAPI_HANDLE_THREAD,
+ (gpointer *)&thread_handle);
+ if (ok == FALSE) {
+ g_warning ("%s: error looking up thread handle %p", __func__,
+ handle);
+ return (0xFFFFFFFF);
+ }
+
+ if (thread_handle->thread == NULL) {
+ return(0xFFFFFFFF);
+ }
+
+ if (!thread_handle->thread->suspend_count) {
+ if (handle == current)
+ _wapi_timed_thread_suspend (thread_handle->thread);
+ else {
+ pthread_kill (thread_handle->thread->id, SIGPWR);
+ while (MONO_SEM_WAIT (&thread_handle->thread->suspended_sem) != 0) {
+ if (errno != EINTR) {
+ return(0xFFFFFFFF);
+ }
+ }
+ }
+ }
+
+ return (thread_handle->thread->suspend_count++);
+#else
return(0xFFFFFFFF);
+#endif
}
/*
static pthread_key_t TLS_keys[TLS_MINIMUM_AVAILABLE];
static gboolean TLS_used[TLS_MINIMUM_AVAILABLE]={FALSE};
-static pthread_mutex_t TLS_mutex=PTHREAD_MUTEX_INITIALIZER;
+static guint32 TLS_spinlock=0;
+
+guint32
+mono_pthread_key_for_tls (guint32 idx)
+{
+ return (guint32)TLS_keys [idx];
+}
/**
* TlsAlloc:
guint32 TlsAlloc(void)
{
guint32 i;
+ int thr_ret;
- pthread_mutex_lock(&TLS_mutex);
+ MONO_SPIN_LOCK (TLS_spinlock);
for(i=0; i<TLS_MINIMUM_AVAILABLE; i++) {
if(TLS_used[i]==FALSE) {
TLS_used[i]=TRUE;
- pthread_key_create(&TLS_keys[i], NULL);
+ thr_ret = pthread_key_create(&TLS_keys[i], NULL);
+ g_assert (thr_ret == 0);
- pthread_mutex_unlock(&TLS_mutex);
+ MONO_SPIN_UNLOCK (TLS_spinlock);
+
+#ifdef TLS_DEBUG
+ g_message ("%s: returning key %d", __func__, i);
+#endif
return(i);
}
}
- pthread_mutex_unlock(&TLS_mutex);
+ MONO_SPIN_UNLOCK (TLS_spinlock);
+
+#ifdef TLS_DEBUG
+ g_message ("%s: out of indices", __func__);
+#endif
+
return(TLS_OUT_OF_INDEXES);
}
+#define MAKE_GC_ID(idx) (GUINT_TO_POINTER((idx)|(GetCurrentThreadId()<<8)))
+
/**
* TlsFree:
* @idx: The TLS index to free
*/
gboolean TlsFree(guint32 idx)
{
- pthread_mutex_lock(&TLS_mutex);
+ int thr_ret;
+
+#ifdef TLS_DEBUG
+ g_message ("%s: freeing key %d", __func__, idx);
+#endif
+
+ MONO_SPIN_LOCK (TLS_spinlock);
if(TLS_used[idx]==FALSE) {
- pthread_mutex_unlock(&TLS_mutex);
+ MONO_SPIN_UNLOCK (TLS_spinlock);
+
return(FALSE);
}
TLS_used[idx]=FALSE;
- pthread_key_delete(TLS_keys[idx]);
+ thr_ret = pthread_key_delete(TLS_keys[idx]);
+ g_assert (thr_ret == 0);
- pthread_mutex_unlock(&TLS_mutex);
+ MONO_SPIN_UNLOCK (TLS_spinlock);
return(TRUE);
}
{
gpointer ret;
- pthread_mutex_lock(&TLS_mutex);
-
- if(TLS_used[idx]==FALSE) {
- pthread_mutex_unlock(&TLS_mutex);
- return(NULL);
- }
+#ifdef TLS_DEBUG
+ g_message ("%s: looking up key %d", __func__, idx);
+#endif
ret=pthread_getspecific(TLS_keys[idx]);
-
- pthread_mutex_unlock(&TLS_mutex);
+
+#ifdef TLS_DEBUG
+ g_message ("%s: returning %p", __func__, ret);
+#endif
return(ret);
}
gboolean TlsSetValue(guint32 idx, gpointer value)
{
int ret;
+
+#ifdef TLS_DEBUG
+ g_message ("%s: setting key %d to %p", __func__, idx, value);
+#endif
- pthread_mutex_lock(&TLS_mutex);
+ MONO_SPIN_LOCK (TLS_spinlock);
if(TLS_used[idx]==FALSE) {
- pthread_mutex_unlock(&TLS_mutex);
+#ifdef TLS_DEBUG
+ g_message ("%s: key %d unused", __func__, idx);
+#endif
+
+ MONO_SPIN_UNLOCK (TLS_spinlock);
+
return(FALSE);
}
ret=pthread_setspecific(TLS_keys[idx], value);
if(ret!=0) {
- pthread_mutex_unlock(&TLS_mutex);
+#ifdef TLS_DEBUG
+ g_message ("%s: pthread_setspecific error: %s", __func__,
+ strerror (ret));
+#endif
+
+ MONO_SPIN_UNLOCK (TLS_spinlock);
+
return(FALSE);
}
- pthread_mutex_unlock(&TLS_mutex);
+ MONO_SPIN_UNLOCK (TLS_spinlock);
return(TRUE);
}
/**
- * Sleep:
+ * SleepEx:
* @ms: The time in milliseconds to suspend for
+ * @alertable: if TRUE, the wait can be interrupted by an APC call
*
* Suspends execution of the current thread for @ms milliseconds. A
* value of zero causes the thread to relinquish its time slice. A
* value of %INFINITE causes an infinite delay.
*/
-void Sleep(guint32 ms)
+guint32 SleepEx(guint32 ms, gboolean alertable)
{
struct timespec req, rem;
- div_t divvy;
+ int ms_quot, ms_rem;
int ret;
+ gpointer current_thread = NULL;
#ifdef DEBUG
- g_message(G_GNUC_PRETTY_FUNCTION ": Sleeping for %d ms", ms);
+ g_message("%s: Sleeping for %d ms", __func__, ms);
#endif
+ if (alertable) {
+ current_thread = GetCurrentThread ();
+ if (_wapi_thread_apc_pending (current_thread)) {
+ _wapi_thread_dispatch_apc_queue (current_thread);
+ return WAIT_IO_COMPLETION;
+ }
+ }
+
if(ms==0) {
sched_yield();
- return;
+ return 0;
}
/* FIXME: check for INFINITE and sleep forever */
- divvy=div((int)ms, 1000);
+ ms_quot = ms / 1000;
+ ms_rem = ms % 1000;
- req.tv_sec=divvy.quot;
- req.tv_nsec=divvy.rem*1000;
+ req.tv_sec=ms_quot;
+ req.tv_nsec=ms_rem*1000000;
again:
ret=nanosleep(&req, &rem);
+
+ if (alertable && _wapi_thread_apc_pending (current_thread)) {
+ _wapi_thread_dispatch_apc_queue (current_thread);
+ return WAIT_IO_COMPLETION;
+ }
+
if(ret==-1) {
/* Sleep interrupted with rem time remaining */
#ifdef DEBUG
- guint32 rems=rem.tv_sec*1000 + rem.tv_nsec/1000;
+ guint32 rems=rem.tv_sec*1000 + rem.tv_nsec/1000000;
- g_message(G_GNUC_PRETTY_FUNCTION ": Still got %d ms to go",
- rems);
+ g_message("%s: Still got %d ms to go", __func__, rems);
#endif
req=rem;
goto again;
}
+
+ return 0;
}
+
+void Sleep(guint32 ms)
+{
+ SleepEx(ms, FALSE);
+}
+
+guint32 QueueUserAPC (WapiApcProc apc_callback, gpointer handle,
+ gpointer param)
+{
+ struct _WapiHandle_thread *thread_handle;
+ gboolean ok;
+
+ ok = _wapi_lookup_handle (handle, WAPI_HANDLE_THREAD,
+ (gpointer *)&thread_handle);
+ if (ok == FALSE) {
+ g_warning ("%s: error looking up thread handle %p", __func__,
+ handle);
+ return (0);
+ }
+
+ _wapi_timed_thread_queue_apc (thread_handle->thread, apc_callback,
+ param);
+ return(1);
+}
+
+gboolean _wapi_thread_cur_apc_pending (void)
+{
+ return(_wapi_thread_apc_pending (GetCurrentThread ()));
+}
+
+gboolean _wapi_thread_apc_pending (gpointer handle)
+{
+ struct _WapiHandle_thread *thread_handle;
+ gboolean ok;
+
+ ok = _wapi_lookup_handle (handle, WAPI_HANDLE_THREAD,
+ (gpointer *)&thread_handle);
+ if (ok == FALSE) {
+ g_warning ("%s: error looking up thread handle %p", __func__,
+ handle);
+ return (FALSE);
+ }
+
+ return(_wapi_timed_thread_apc_pending (thread_handle->thread));
+}
+
+gboolean _wapi_thread_dispatch_apc_queue (gpointer handle)
+{
+ struct _WapiHandle_thread *thread_handle;
+ gboolean ok;
+
+ ok = _wapi_lookup_handle (handle, WAPI_HANDLE_THREAD,
+ (gpointer *)&thread_handle);
+ if (ok == FALSE) {
+ g_warning ("%s: error looking up thread handle %p", __func__,
+ handle);
+ return (0);
+ }
+
+ _wapi_timed_thread_dispatch_apc_queue (thread_handle->thread);
+ return(1);
+}
+
+void _wapi_thread_own_mutex (pthread_t tid, gpointer mutex)
+{
+ struct _WapiHandle_thread *thread_handle;
+ gboolean ok;
+ gpointer thread;
+
+ thread = _wapi_thread_handle_from_id (tid);
+ if (thread == NULL) {
+ g_warning ("%s: error looking up thread by ID", __func__);
+ return;
+ }
+
+ ok = _wapi_lookup_handle (thread, WAPI_HANDLE_THREAD,
+ (gpointer *)&thread_handle);
+ if (ok == FALSE) {
+ g_warning ("%s: error looking up thread handle %p", __func__,
+ thread);
+ return;
+ }
+
+ g_ptr_array_add (thread_handle->owned_mutexes, mutex);
+}
+
+void _wapi_thread_disown_mutex (pthread_t tid, gpointer mutex)
+{
+ struct _WapiHandle_thread *thread_handle;
+ gboolean ok;
+ gpointer thread;
+
+ thread = _wapi_thread_handle_from_id (tid);
+ if (thread == NULL) {
+ g_warning ("%s: error looking up thread by ID", __func__);
+ return;
+ }
+
+ ok = _wapi_lookup_handle (thread, WAPI_HANDLE_THREAD,
+ (gpointer *)&thread_handle);
+ if (ok == FALSE) {
+ g_warning ("%s: error looking up thread handle %p", __func__,
+ thread);
+ return;
+ }
+
+ g_ptr_array_remove (thread_handle->owned_mutexes, mutex);
+}
+
+
+
+#ifdef WITH_INCLUDED_LIBGC
+
+static void GC_suspend_handler (int sig)
+{
+ struct _WapiHandle_thread *thread_handle;
+ gpointer handle;
+ gboolean ok;
+
+ handle = GetCurrentThread ();
+ ok = _wapi_lookup_handle (handle, WAPI_HANDLE_THREAD,
+ (gpointer *)&thread_handle);
+ if (ok == FALSE) {
+ g_warning ("%s: error looking up thread handle %p", __func__,
+ handle);
+ return;
+ }
+
+ thread_handle->thread->stack_ptr = &ok;
+ MONO_SEM_POST (&thread_handle->thread->suspended_sem);
+
+ _wapi_timed_thread_suspend (thread_handle->thread);
+
+ thread_handle->thread->stack_ptr = NULL;
+}
+
+static void gc_init (void)
+{
+ struct sigaction act;
+
+ act.sa_handler = GC_suspend_handler;
+ g_assert (sigaction (SIGPWR, &act, NULL) == 0);
+}
+
+void mono_wapi_push_thread_stack (gpointer handle, gpointer stack_ptr)
+{
+ struct _WapiHandle_thread *thread_handle;
+ gboolean ok;
+
+ ok = _wapi_lookup_handle (handle, WAPI_HANDLE_THREAD,
+ (gpointer *)&thread_handle);
+ if (ok == FALSE) {
+ g_warning ("%s: error looking up thread handle %p", __func__,
+ handle);
+ return;
+ }
+
+ GC_push_all_stack (thread_handle->thread->stack_ptr, stack_ptr);
+}
+
+#endif /* WITH_INCLUDED_LIBGC */
projects / mono.git / blobdiff