*/
#include <config.h>
+#ifdef PLATFORM_WIN32
+#define _WIN32_WINNT 0x0500
+#endif
+
#include <glib.h>
#include <signal.h>
+#include <string.h>
#include <mono/metadata/object.h>
-#include <mono/metadata/appdomain.h>
+#include <mono/metadata/domain-internals.h>
#include <mono/metadata/profiler-private.h>
#include <mono/metadata/threads.h>
#include <mono/metadata/threadpool.h>
#include <mono/metadata/environment.h>
#include <mono/metadata/monitor.h>
#include <mono/metadata/gc-internal.h>
+#include <mono/metadata/marshal.h>
#include <mono/io-layer/io-layer.h>
#include <mono/os/gc_wrapper.h>
/* Spin lock for InterlockedXXX 64 bit functions */
static CRITICAL_SECTION interlocked_mutex;
+/* Controls access to interruption flag */
+static CRITICAL_SECTION interruption_mutex;
+
+/* global count of thread interruptions requested */
+static gint32 thread_interruption_requested = 0;
+
+
/* handle_store() and handle_remove() manage the array of threads that
* still need to be waited for when the main thread exits.
*/
static void thread_cleanup (MonoThread *thread)
{
- mono_monitor_try_enter ((MonoObject *)thread, INFINITE);
+ if (!mono_monitor_enter (thread->synch_lock))
+ return;
+
thread->state |= ThreadState_Stopped;
- mono_monitor_exit ((MonoObject *)thread);
+ mono_monitor_exit (thread->synch_lock);
mono_profiler_thread_end (thread->tid);
handle_remove (thread->tid);
mono_thread_push_appdomain_ref (mono_domain_get ());
thread_adjust_static_data (thread);
+#ifdef DEBUG
+ g_message (G_GNUC_PRETTY_FUNCTION "start_wrapper for %d\n", thread->tid);
+#endif
start_func (this);
-
+#ifdef PLATFORM_WIN32
/* If the thread calls ExitThread at all, this remaining code
* will not be executed, but the main thread will eventually
* call thread_cleanup() on this thread's behalf.
TlsSetValue (current_object_key, NULL);
thread_cleanup (thread);
-
+#endif
+
return(0);
}
start_info->obj = thread;
start_info->domain = domain;
start_info->this = arg;
-
+
/* Create suspended, so we can do some housekeeping before the thread
* starts
*/
thread->handle=thread_handle;
thread->tid=tid;
+ thread->synch_lock=mono_object_new (domain, mono_defaults.object_class);
+
handle_store(thread);
ResumeThread (thread_handle);
}
void
-ves_icall_System_Threading_ThreadPool_GetAvailableThreads (int *workerThreads, int *completionPortThreads)
-{
- int busy;
-
- MONO_ARCH_SAVE_REGS;
-
- busy = (int) InterlockedCompareExchange (&busy_worker_threads, 0, -1);
- *workerThreads = mono_max_worker_threads - busy;
- *completionPortThreads = 0;
-}
-
-void
-ves_icall_System_Threading_ThreadPool_GetMaxThreads (int *workerThreads, int *completionPortThreads)
+mono_thread_detach (MonoThread *thread)
{
+ g_return_if_fail (thread != NULL);
- MONO_ARCH_SAVE_REGS;
-
- *workerThreads = mono_max_worker_threads;
- *completionPortThreads = 0;
+#ifdef DEBUG
+ g_message (G_GNUC_PRETTY_FUNCTION "mono_thread_detach for %d\n", thread->tid);
+#endif
+ TlsSetValue (current_object_key, NULL);
+
+ thread_cleanup (thread);
}
HANDLE ves_icall_System_Threading_Thread_Thread_internal(MonoThread *this,
#endif
im = mono_get_delegate_invoke (start->vtable->klass);
+ im = mono_marshal_get_delegate_invoke (im);
if (mono_thread_callbacks)
start_func = (* mono_thread_callbacks->thread_start_compile_func) (im);
else
GetCurrentThreadId (), this, this->tid);
#endif
- WaitForSingleObject (this->start_notify, INFINITE);
+ WaitForSingleObjectEx (this->start_notify, INFINITE, FALSE);
CloseHandle (this->start_notify);
this->start_notify=NULL;
}
void ves_icall_System_Threading_Thread_Sleep_internal(gint32 ms)
{
+ MonoThread *thread = mono_thread_current ();
+
MONO_ARCH_SAVE_REGS;
#ifdef THREAD_DEBUG
g_message(G_GNUC_PRETTY_FUNCTION ": Sleeping for %d ms", ms);
#endif
- Sleep(ms);
+ mono_monitor_enter (thread->synch_lock);
+ thread->state |= ThreadState_WaitSleepJoin;
+ mono_monitor_exit (thread->synch_lock);
+
+ SleepEx(ms,TRUE);
+
+ mono_monitor_enter (thread->synch_lock);
+ thread->state &= ~ThreadState_WaitSleepJoin;
+ mono_monitor_exit (thread->synch_lock);
}
gint32
MONO_ARCH_SAVE_REGS;
+ mono_monitor_enter (this->synch_lock);
+ this->state |= ThreadState_WaitSleepJoin;
+ mono_monitor_exit (this->synch_lock);
+
if(ms== -1) {
ms=INFINITE;
}
thread, ms);
#endif
- ret=WaitForSingleObject(thread, ms);
+ ret=WaitForSingleObjectEx (thread, ms, TRUE);
+
+ mono_monitor_enter (this->synch_lock);
+ this->state &= ~ThreadState_WaitSleepJoin;
+ mono_monitor_exit (this->synch_lock);
+
if(ret==WAIT_OBJECT_0) {
#ifdef THREAD_DEBUG
g_message (G_GNUC_PRETTY_FUNCTION ": join successful");
ms=INFINITE;
}
- ret=WaitForMultipleObjects(numhandles, handles, TRUE, ms);
+ ret=WaitForMultipleObjectsEx(numhandles, handles, TRUE, ms, TRUE);
g_free(handles);
-
+
if(ret==WAIT_FAILED) {
#ifdef THREAD_WAIT_DEBUG
g_message(G_GNUC_PRETTY_FUNCTION ": (%d) Wait failed",
GetCurrentThreadId ());
#endif
return(FALSE);
- } else if(ret==WAIT_TIMEOUT) {
+ } else if(ret==WAIT_TIMEOUT || ret == WAIT_IO_COMPLETION) {
+ /* Do we want to try again if we get
+ * WAIT_IO_COMPLETION? The documentation for
+ * WaitHandle doesn't give any clues. (We'd have to
+ * fiddle with the timeout if we retry.)
+ */
#ifdef THREAD_WAIT_DEBUG
g_message(G_GNUC_PRETTY_FUNCTION ": (%d) Wait timed out",
GetCurrentThreadId ());
ms=INFINITE;
}
- ret=WaitForMultipleObjects(numhandles, handles, FALSE, ms);
+ ret=WaitForMultipleObjectsEx(numhandles, handles, FALSE, ms, TRUE);
g_free(handles);
-
+
#ifdef THREAD_WAIT_DEBUG
g_message(G_GNUC_PRETTY_FUNCTION ": (%d) returning %d",
GetCurrentThreadId (), ret);
ms=INFINITE;
}
- ret=WaitForSingleObject(handle, ms);
+ ret=WaitForSingleObjectEx (handle, ms, TRUE);
+
if(ret==WAIT_FAILED) {
#ifdef THREAD_WAIT_DEBUG
g_message(G_GNUC_PRETTY_FUNCTION ": (%d) Wait failed",
GetCurrentThreadId ());
#endif
return(FALSE);
- } else if(ret==WAIT_TIMEOUT) {
+ } else if(ret==WAIT_TIMEOUT || ret == WAIT_IO_COMPLETION) {
+ /* Do we want to try again if we get
+ * WAIT_IO_COMPLETION? The documentation for
+ * WaitHandle doesn't give any clues. (We'd have to
+ * fiddle with the timeout if we retry.)
+ */
#ifdef THREAD_WAIT_DEBUG
g_message(G_GNUC_PRETTY_FUNCTION ": (%d) Wait timed out",
GetCurrentThreadId ());
return(TRUE);
}
-HANDLE ves_icall_System_Threading_Mutex_CreateMutex_internal (MonoBoolean owned, MonoString *name)
+HANDLE ves_icall_System_Threading_Mutex_CreateMutex_internal (MonoBoolean owned, MonoString *name, MonoBoolean *created)
{
+ HANDLE mutex;
+
MONO_ARCH_SAVE_REGS;
- return(CreateMutex (NULL, owned,
- name==NULL?NULL:mono_string_chars (name)));
+ *created = TRUE;
+
+ if (name == NULL) {
+ mutex = CreateMutex (NULL, owned, NULL);
+ } else {
+ mutex = CreateMutex (NULL, owned, mono_string_chars (name));
+
+ if (GetLastError () == ERROR_ALREADY_EXISTS) {
+ *created = FALSE;
+ }
+ }
+
+ return(mutex);
}
void ves_icall_System_Threading_Mutex_ReleaseMutex_internal (HANDLE handle ) {
#endif /* __MINGW32__ */
}
+#ifdef __MINGW32__
+static guint32 interruption_request_apc (gpointer param)
+{
+ MonoException* exc = mono_thread_request_interruption (FALSE);
+ if (exc) mono_raise_exception (exc);
+ return 0;
+}
+#endif /* __MINGW32__ */
+
+/*
+ * signal_thread_state_change
+ *
+ * Tells the thread that his state has changed and it has to enter the new
+ * state as soon as possible.
+ */
+static void signal_thread_state_change (MonoThread *thread)
+{
+#ifdef __MINGW32__
+ QueueUserAPC (interruption_request_apc, thread->handle, NULL);
+#else
+ /* fixme: store the state somewhere */
+#ifdef PTHREAD_POINTER_ID
+ pthread_kill (GUINT_TO_POINTER(thread->tid), mono_thread_get_abort_signal ());
+#else
+ pthread_kill (thread->tid, mono_thread_get_abort_signal ());
+#endif
+#endif /* __MINGW32__ */
+}
+
void
ves_icall_System_Threading_Thread_Abort (MonoThread *thread, MonoObject *state)
{
MONO_ARCH_SAVE_REGS;
+ mono_monitor_enter (thread->synch_lock);
+
+ if ((thread->state & ThreadState_AbortRequested) != 0 ||
+ (thread->state & ThreadState_StopRequested) != 0)
+ {
+ mono_monitor_exit (thread->synch_lock);
+ return;
+ }
+
+ thread->state |= ThreadState_AbortRequested;
thread->abort_state = state;
thread->abort_exc = NULL;
+ mono_monitor_exit (thread->synch_lock);
+
#ifdef THREAD_DEBUG
g_message (G_GNUC_PRETTY_FUNCTION
": (%d) Abort requested for %p (%d)", GetCurrentThreadId (),
thread, thread->tid);
#endif
-#ifdef __MINGW32__
- g_assert_not_reached ();
-#else
- /* fixme: store the state somewhere */
-#ifdef PTHREAD_POINTER_ID
- pthread_kill (GUINT_TO_POINTER(thread->tid), mono_thread_get_abort_signal ());
-#else
- pthread_kill (thread->tid, mono_thread_get_abort_signal ());
-#endif
-#endif /* __MINGW32__ */
+ /* Make sure the thread is awake */
+ ves_icall_System_Threading_Thread_Resume (thread);
+
+ signal_thread_state_change (thread);
}
void
ves_icall_System_Threading_Thread_ResetAbort (void)
{
MonoThread *thread = mono_thread_current ();
-
- MONO_ARCH_SAVE_REGS;
+ MONO_ARCH_SAVE_REGS;
+
+ mono_monitor_enter (thread->synch_lock);
+
+ thread->state &= ~ThreadState_AbortRequested;
+
if (!thread->abort_exc) {
const char *msg = "Unable to reset abort because no abort was requested";
+ mono_monitor_exit (thread->synch_lock);
mono_raise_exception (mono_get_exception_thread_state (msg));
} else {
thread->abort_exc = NULL;
thread->abort_state = NULL;
}
+
+ mono_monitor_exit (thread->synch_lock);
+}
+
+void
+ves_icall_System_Threading_Thread_Suspend (MonoThread *thread)
+{
+ MONO_ARCH_SAVE_REGS;
+
+ mono_monitor_enter (thread->synch_lock);
+
+ if ((thread->state & ThreadState_Suspended) != 0 ||
+ (thread->state & ThreadState_SuspendRequested) != 0 ||
+ (thread->state & ThreadState_StopRequested) != 0)
+ {
+ mono_monitor_exit (thread->synch_lock);
+ return;
+ }
+
+ thread->state |= ThreadState_SuspendRequested;
+ mono_monitor_exit (thread->synch_lock);
+
+ signal_thread_state_change (thread);
+}
+
+void
+ves_icall_System_Threading_Thread_Resume (MonoThread *thread)
+{
+ MONO_ARCH_SAVE_REGS;
+
+ mono_monitor_enter (thread->synch_lock);
+
+ if ((thread->state & ThreadState_SuspendRequested) != 0) {
+ thread->state &= ~ThreadState_SuspendRequested;
+ mono_monitor_exit (thread->synch_lock);
+ return;
+ }
+
+ if ((thread->state & ThreadState_Suspended) == 0)
+ {
+ mono_monitor_exit (thread->synch_lock);
+ return;
+ }
+
+ thread->resume_event = CreateEvent (NULL, TRUE, FALSE, NULL);
+
+ /* Awake the thread */
+ SetEvent (thread->suspend_event);
+
+ mono_monitor_exit (thread->synch_lock);
+
+ /* Wait for the thread to awake */
+ WaitForSingleObject (thread->resume_event, INFINITE);
+ CloseHandle (thread->resume_event);
+ thread->resume_event = NULL;
+}
+
+void mono_thread_stop (MonoThread *thread)
+{
+ mono_monitor_enter (thread->synch_lock);
+
+ if ((thread->state & ThreadState_StopRequested) != 0 ||
+ (thread->state & ThreadState_Stopped) != 0)
+ {
+ mono_monitor_exit (thread->synch_lock);
+ return;
+ }
+
+ /* Make sure the thread is awake */
+ ves_icall_System_Threading_Thread_Resume (thread);
+
+ thread->state |= ThreadState_StopRequested;
+ thread->state &= ~ThreadState_AbortRequested;
+
+ mono_monitor_exit (thread->synch_lock);
+
+ signal_thread_state_change (thread);
}
gint8
InitializeCriticalSection(&threads_mutex);
InitializeCriticalSection(&interlocked_mutex);
InitializeCriticalSection(&contexts_mutex);
+ InitializeCriticalSection(&interruption_mutex);
mono_init_static_data_info (&thread_static_info);
mono_init_static_data_info (&context_static_info);
": %d threads to wait for in this batch", wait->num);
#endif
- ret=WaitForMultipleObjects(wait->num, wait->handles, TRUE, timeout);
+ ret=WaitForMultipleObjectsEx(wait->num, wait->handles, TRUE, timeout, FALSE);
+
if(ret==WAIT_FAILED) {
/* See the comment in build_wait_tids() */
#ifdef THREAD_DEBUG
for(i=0; i<wait->num; i++) {
guint32 tid=wait->threads[i]->tid;
+ CloseHandle (wait->handles[i]);
if(mono_g_hash_table_lookup (threads, GUINT_TO_POINTER(tid))!=NULL) {
/* This thread must have been killed, because
struct wait_data *wait=(struct wait_data *)user;
if(wait->num<MAXIMUM_WAIT_OBJECTS) {
+ HANDLE handle;
MonoThread *thread=(MonoThread *)value;
- /* BUG: For now we just ignore background threads, we should abort them
- */
+ /* Ignore background threads, we abort them later */
if (thread->state & ThreadState_Background)
return; /* just leave, ignore */
if (thread == mono_thread_current ())
return;
- wait->handles[wait->num]=thread->handle;
+ handle = OpenThread (THREAD_ALL_ACCESS, TRUE, thread->tid);
+ if (handle == NULL)
+ return;
+
+ wait->handles[wait->num]=handle;
wait->threads[wait->num]=thread;
wait->num++;
} else {
}
}
+static gboolean
+remove_and_abort_threads (gpointer key, gpointer value, gpointer user)
+{
+ struct wait_data *wait=(struct wait_data *)user;
+ guint32 self = GetCurrentThreadId ();
+ MonoThread *thread = (MonoThread *) value;
+ HANDLE handle;
+
+ /* The finalizer thread is not a background thread */
+ if (thread->tid != self && thread->state & ThreadState_Background) {
+
+ handle = OpenThread (THREAD_ALL_ACCESS, TRUE, thread->tid);
+ if (handle == NULL)
+ return FALSE;
+
+ wait->handles[wait->num]=thread->handle;
+ wait->threads[wait->num]=thread;
+ wait->num++;
+
+ if(thread->state & ThreadState_AbortRequested ||
+ thread->state & ThreadState_Aborted) {
+#ifdef THREAD_DEBUG
+ g_message (G_GNUC_PRETTY_FUNCTION ": Thread id %d already aborting", thread->tid);
+#endif
+ return(TRUE);
+ }
+
+#ifdef THREAD_DEBUG
+ g_print (G_GNUC_PRETTY_FUNCTION ": Aborting id: %d\n", thread->tid);
+#endif
+ mono_thread_stop (thread);
+ return TRUE;
+ }
+
+ return (thread->tid != self && !mono_gc_is_finalizer_thread (thread));
+}
+
void mono_thread_manage (void)
{
struct wait_data *wait=g_new0 (struct wait_data, 1);
g_message(G_GNUC_PRETTY_FUNCTION ": Joining each running thread...");
#endif
+ EnterCriticalSection (&threads_mutex);
if(threads==NULL) {
#ifdef THREAD_DEBUG
g_message(G_GNUC_PRETTY_FUNCTION ": No threads");
#endif
+ LeaveCriticalSection (&threads_mutex);
return;
}
+ LeaveCriticalSection (&threads_mutex);
do {
EnterCriticalSection (&threads_mutex);
mono_g_hash_table_size (threads));
mono_g_hash_table_foreach (threads, print_tids, NULL);
#endif
-
+
wait->num=0;
mono_g_hash_table_foreach (threads, build_wait_tids, wait);
-
LeaveCriticalSection (&threads_mutex);
if(wait->num>0) {
/* Something to wait for */
}
} while(wait->num>0);
- g_free (wait);
+ mono_thread_pool_cleanup ();
EnterCriticalSection(&threads_mutex);
- mono_g_hash_table_destroy(threads);
- threads=NULL;
+ /*
+ * Remove everything but the finalizer thread and self.
+ * Also abort all the background threads
+ * */
+ wait->num = 0;
+ mono_g_hash_table_foreach_remove (threads, remove_and_abort_threads, wait);
LeaveCriticalSection(&threads_mutex);
+
+ if(wait->num>0) {
+ /* Something to wait for */
+ wait_for_tids (wait, INFINITE);
+ }
+
+ g_free (wait);
}
static void terminate_thread (gpointer key, gpointer value, gpointer user)
MonoThread *thread = mono_thread_current ();
if (thread) {
- //printf ("PUSH REF: %p -> %s.\n", thread, domain->friendly_name);
+ /* printf ("PUSH REF: %p -> %s.\n", thread, domain->friendly_name); */
EnterCriticalSection (&threads_mutex);
thread->appdomain_refs = g_slist_prepend (thread->appdomain_refs, domain);
LeaveCriticalSection (&threads_mutex);
MonoThread *thread = mono_thread_current ();
if (thread) {
- //printf ("POP REF: %p -> %s.\n", thread, ((MonoDomain*)(thread->appdomain_refs->data))->friendly_name);
+ /* printf ("POP REF: %p -> %s.\n", thread, ((MonoDomain*)(thread->appdomain_refs->data))->friendly_name); */
EnterCriticalSection (&threads_mutex);
- // FIXME: How can the list be empty ?
+ /* FIXME: How can the list be empty ? */
if (thread->appdomain_refs)
thread->appdomain_refs = g_slist_remove (thread->appdomain_refs, thread->appdomain_refs->data);
LeaveCriticalSection (&threads_mutex);
MonoDomain *domain = data->domain;
if (mono_thread_has_appdomain_ref (thread, domain)) {
- //printf ("ABORTING THREAD %p BECAUSE IT REFERENCES DOMAIN %s.\n", thread, domain->friendly_name);
- ves_icall_System_Threading_Thread_Abort (thread, (MonoObject*)domain->domain);
+ /* printf ("ABORTING THREAD %p BECAUSE IT REFERENCES DOMAIN %s.\n", thread, domain->friendly_name); */
+ HANDLE handle = OpenThread (THREAD_ALL_ACCESS, TRUE, thread->tid);
+ if (handle == NULL)
+ return;
+
+ ves_icall_System_Threading_Thread_Abort (thread, NULL);
if(data->wait.num<MAXIMUM_WAIT_OBJECTS) {
- data->wait.handles [data->wait.num] = thread->handle;
+ data->wait.handles [data->wait.num] = handle;
data->wait.threads [data->wait.num] = thread;
data->wait.num++;
} else {
abort_appdomain_data user_data;
guint32 start_time;
- //printf ("ABORT BEGIN.\n");
+ /* printf ("ABORT BEGIN.\n"); */
start_time = GetTickCount ();
do {
}
while (user_data.wait.num > 0);
- //printf ("ABORT DONE.\n");
+ /* printf ("ABORT DONE.\n"); */
return TRUE;
}
{
EnterCriticalSection (&threads_mutex);
offset = mono_alloc_static_data_slot (&thread_static_info, size, align);
- mono_g_hash_table_foreach (threads, alloc_thread_static_data_helper, GUINT_TO_POINTER (offset));
+ /* This can be called during startup */
+ if (threads != NULL)
+ mono_g_hash_table_foreach (threads, alloc_thread_static_data_helper, GUINT_TO_POINTER (offset));
LeaveCriticalSection (&threads_mutex);
}
else
EnterCriticalSection (&contexts_mutex);
offset = mono_alloc_static_data_slot (&context_static_info, size, align);
LeaveCriticalSection (&contexts_mutex);
- offset |= 0x80000000; // Set the high bit to indicate context static data
+ offset |= 0x80000000; /* Set the high bit to indicate context static data */
}
return offset;
}
gpointer
mono_get_special_static_data (guint32 offset)
{
- // The high bit means either thread (0) or static (1) data.
+ /* The high bit means either thread (0) or static (1) data. */
guint32 static_type = (offset & 0x80000000);
int idx;
}
else
{
- // Allocate static data block under demand, since we don't have a list
+ /* Allocate static data block under demand, since we don't have a list
// of contexts
+ */
MonoAppContext *context = mono_context_get ();
if (!context->static_data || !context->static_data [idx]) {
EnterCriticalSection (&contexts_mutex);
LeaveCriticalSection (&threads_mutex);
}
+
+static guint32 dummy_apc (gpointer param)
+{
+ return 0;
+}
+
+/*
+ * mono_thread_execute_interruption
+ *
+ * Performs the operation that the requested thread state requires (abort,
+ * suspend or stop)
+ */
+static MonoException* mono_thread_execute_interruption (MonoThread *thread)
+{
+ mono_monitor_enter (thread->synch_lock);
+
+ if (thread->interruption_requested) {
+ /* this will consume pending APC calls */
+ WaitForSingleObjectEx (GetCurrentThread(), 0, TRUE);
+ EnterCriticalSection (&interruption_mutex);
+ thread_interruption_requested--;
+ LeaveCriticalSection (&interruption_mutex);
+ thread->interruption_requested = FALSE;
+ }
+
+ if ((thread->state & ThreadState_AbortRequested) != 0) {
+ thread->abort_exc = mono_get_exception_thread_abort ();
+ mono_monitor_exit (thread->synch_lock);
+ return thread->abort_exc;
+ }
+ else if ((thread->state & ThreadState_SuspendRequested) != 0) {
+ thread->state &= ~ThreadState_SuspendRequested;
+ thread->state |= ThreadState_Suspended;
+ thread->suspend_event = CreateEvent (NULL, TRUE, FALSE, NULL);
+ mono_monitor_exit (thread->synch_lock);
+
+ WaitForSingleObject (thread->suspend_event, INFINITE);
+
+ mono_monitor_enter (thread->synch_lock);
+ CloseHandle (thread->suspend_event);
+ thread->suspend_event = NULL;
+ thread->state &= ~ThreadState_Suspended;
+
+ /* The thread that requested the resume will have replaced this event
+ * and will be waiting for it
+ */
+ SetEvent (thread->resume_event);
+ mono_monitor_exit (thread->synch_lock);
+ return NULL;
+ }
+ else if ((thread->state & ThreadState_StopRequested) != 0) {
+ /* FIXME: do this through the JIT? */
+ mono_monitor_exit (thread->synch_lock);
+ ExitThread (-1);
+ return NULL;
+ }
+
+ mono_monitor_exit (thread->synch_lock);
+ return NULL;
+}
+
+/*
+ * mono_thread_request_interruption
+ *
+ * A signal handler can call this method to request the interruption of a
+ * thread. The result of the interruption will depend on the current state of
+ * the thread. If the result is an exception that needs to be throw, it is
+ * provided as return value.
+ */
+MonoException* mono_thread_request_interruption (gboolean running_managed)
+{
+ MonoThread *thread = mono_thread_current ();
+
+ /* The thread may already be stopping */
+ if (thread == NULL)
+ return NULL;
+
+ mono_monitor_enter (thread->synch_lock);
+
+ if (thread->interruption_requested) {
+ mono_monitor_exit (thread->synch_lock);
+ return NULL;
+ }
+
+ if (!running_managed) {
+ /* Can't stop while in unmanaged code. Increase the global interruption
+ request count. When exiting the unmanaged method the count will be
+ checked and the thread will be interrupted. */
+
+ EnterCriticalSection (&interruption_mutex);
+ thread_interruption_requested++;
+ LeaveCriticalSection (&interruption_mutex);
+
+ thread->interruption_requested = TRUE;
+ mono_monitor_exit (thread->synch_lock);
+
+ /* this will awake the thread if it is in WaitForSingleObject
+ or similar */
+ QueueUserAPC (dummy_apc, thread->handle, NULL);
+
+ return NULL;
+ }
+ else {
+ mono_monitor_exit (thread->synch_lock);
+ return mono_thread_execute_interruption (thread);
+ }
+}
+
+gboolean mono_thread_interruption_requested ()
+{
+ if (thread_interruption_requested) {
+ MonoThread *thread = mono_thread_current ();
+ /* The thread may already be stopping */
+ if (thread != NULL)
+ return (thread->interruption_requested);
+ }
+ return FALSE;
+}
+
+/*
+ * Performs the interruption of the current thread, if one has been requested.
+ */
+void mono_thread_interruption_checkpoint ()
+{
+ MonoThread *thread = mono_thread_current ();
+
+ /* The thread may already be stopping */
+ if (thread == NULL)
+ return;
+
+ if (thread->interruption_requested) {
+ MonoException* exc = mono_thread_execute_interruption (thread);
+ if (exc) mono_raise_exception (exc);
+ }
+}
+
+/*
+ * Returns the address of a flag that will be non-zero if an interruption has
+ * been requested for a thread. The thread to interrupt may not be the current
+ * thread, so an additional call to mono_thread_interruption_requested() or
+ * mono_thread_interruption_checkpoint() is allways needed if the flag is not
+ * zero.
+ */
+gint32* mono_thread_interruption_request_flag ()
+{
+ return &thread_interruption_requested;
+}
+
#ifdef WITH_INCLUDED_LIBGC
static void gc_push_all_stacks (gpointer key, gpointer value, gpointer user)
projects / mono.git / blobdiff