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Diffstat (limited to 'agent/tcf/system/Windows/pthreads-win32.c')
-rw-r--r--agent/tcf/system/Windows/pthreads-win32.c311
1 files changed, 0 insertions, 311 deletions
diff --git a/agent/tcf/system/Windows/pthreads-win32.c b/agent/tcf/system/Windows/pthreads-win32.c
deleted file mode 100644
index e6118798..00000000
--- a/agent/tcf/system/Windows/pthreads-win32.c
+++ /dev/null
@@ -1,311 +0,0 @@
-/*******************************************************************************
- * Copyright (c) 2010, 2011 Wind River Systems, Inc. and others.
- * All rights reserved. This program and the accompanying materials
- * are made available under the terms of the Eclipse Public License v1.0
- * and Eclipse Distribution License v1.0 which accompany this distribution.
- * The Eclipse Public License is available at
- * http://www.eclipse.org/legal/epl-v10.html
- * and the Eclipse Distribution License is available at
- * http://www.eclipse.org/org/documents/edl-v10.php.
- * You may elect to redistribute this code under either of these licenses.
- *
- * Contributors:
- * Wind River Systems - initial API and implementation
- *******************************************************************************/
-
-#include <tcf/config.h>
-
-#if defined(WIN32) && !defined(DISABLE_PTHREADS_WIN32)
-
-#include <assert.h>
-#include <tcf/framework/myalloc.h>
-#include <tcf/framework/errors.h>
-#include <tcf/system/Windows/pthreads-win32.h>
-
-/*********************************************************************
- Support of pthreads on Windows is implemented according to
- recommendations from the paper:
-
- Strategies for Implementing POSIX Condition Variables on Win32
- C++ Report, SIGS, Vol. 10, No. 5, June, 1998
-
- Douglas C. Schmidt and Irfan Pyarali
- Department of Computer Science
- Washington University, St. Louis, Missouri
-**********************************************************************/
-
-/* TODO: POSIX pthread functions don't set errno */
-
-typedef struct {
- int waiters_count;
- CRITICAL_SECTION waiters_count_lock;
- HANDLE sema;
- HANDLE waiters_done;
- size_t was_broadcast;
-} PThreadCond;
-
-int pthread_mutex_init(pthread_mutex_t * mutex, const pthread_mutexattr_t * attr) {
- assert(attr == NULL);
- *mutex = (pthread_mutex_t)CreateMutex(NULL, FALSE, NULL);
- if (*mutex == NULL) return set_win32_errno(GetLastError());
- return 0;
-}
-
-int pthread_mutex_lock(pthread_mutex_t * mutex) {
- assert(mutex != NULL);
- assert(*mutex != NULL);
- if (WaitForSingleObject(*mutex, INFINITE) == WAIT_FAILED) return set_win32_errno(GetLastError());
- return 0;
-}
-
-int pthread_mutex_unlock(pthread_mutex_t * mutex) {
- assert(mutex != NULL);
- assert(*mutex != NULL);
- if (!ReleaseMutex(*mutex)) return set_win32_errno(GetLastError());
- return 0;
-}
-
-int pthread_mutex_destroy(pthread_mutex_t *mutex) {
- assert(mutex != NULL);
- assert(*mutex != NULL);
- if (!CloseHandle(*mutex)) return set_win32_errno(GetLastError());
- return 0;
-}
-
-int pthread_cond_init(pthread_cond_t * cond, const pthread_condattr_t * attr) {
- PThreadCond * p = (PThreadCond *)loc_alloc_zero(sizeof(PThreadCond));
- assert(attr == NULL);
- p->waiters_count = 0;
- p->was_broadcast = 0;
- p->sema = CreateSemaphore(NULL, 0, 0x7fffffff, NULL);
- if (p->sema == NULL) return set_win32_errno(GetLastError());
- InitializeCriticalSection(&p->waiters_count_lock);
- p->waiters_done = CreateEvent(NULL, FALSE, FALSE, NULL);
- if (p->waiters_done == NULL) return set_win32_errno(GetLastError());
- *cond = (pthread_cond_t)p;
- return 0;
-}
-
-int pthread_cond_wait(pthread_cond_t * cond, pthread_mutex_t * mutex) {
- DWORD res = 0;
- int last_waiter = 0;
- PThreadCond * p = (PThreadCond *)*cond;
-
- EnterCriticalSection(&p->waiters_count_lock);
- p->waiters_count++;
- LeaveCriticalSection(&p->waiters_count_lock);
-
- /* This call atomically releases the mutex and waits on the */
- /* semaphore until <pthread_cond_signal> or <pthread_cond_broadcast> */
- /* are called by another thread. */
- res = SignalObjectAndWait(*mutex, p->sema, INFINITE, FALSE);
- if (res == WAIT_FAILED) return set_win32_errno(GetLastError());
-
- /* Re-acquire lock to avoid race conditions. */
- EnterCriticalSection(&p->waiters_count_lock);
-
- /* We're no longer waiting... */
- p->waiters_count--;
-
- /* Check to see if we're the last waiter after <pthread_cond_broadcast>. */
- last_waiter = p->was_broadcast && p->waiters_count == 0;
-
- LeaveCriticalSection(&p->waiters_count_lock);
-
- /* If we're the last waiter thread during this particular broadcast */
- /* then let all the other threads proceed. */
- if (last_waiter) {
- /* This call atomically signals the <waiters_done_> event and waits until */
- /* it can acquire the <mutex>. This is required to ensure fairness. */
- DWORD err = SignalObjectAndWait(p->waiters_done, *mutex, INFINITE, FALSE);
- if (err == WAIT_FAILED) return set_win32_errno(GetLastError());
- }
- else {
- /* Always regain the external mutex since that's the guarantee we */
- /* give to our callers. */
- DWORD err = WaitForSingleObject(*mutex, INFINITE);
- if (err == WAIT_FAILED) return set_win32_errno(GetLastError());
- }
- assert(res == WAIT_OBJECT_0);
- return 0;
-}
-
-int pthread_cond_timedwait(pthread_cond_t * cond, pthread_mutex_t * mutex, const struct timespec * abstime) {
- DWORD res = 0;
- int last_waiter = 0;
- PThreadCond * p = (PThreadCond *)*cond;
- DWORD timeout = 0;
- struct timespec timenow;
-
- if (clock_gettime(CLOCK_REALTIME, &timenow)) return errno;
- if (abstime->tv_sec < timenow.tv_sec) return ETIMEDOUT;
- if (abstime->tv_sec == timenow.tv_sec) {
- if (abstime->tv_nsec <= timenow.tv_nsec) return ETIMEDOUT;
- }
- timeout = (DWORD)((abstime->tv_sec - timenow.tv_sec) * 1000 + (abstime->tv_nsec - timenow.tv_nsec) / 1000000 + 5);
-
- EnterCriticalSection(&p->waiters_count_lock);
- p->waiters_count++;
- LeaveCriticalSection(&p->waiters_count_lock);
-
- /* This call atomically releases the mutex and waits on the */
- /* semaphore until <pthread_cond_signal> or <pthread_cond_broadcast> */
- /* are called by another thread. */
- res = SignalObjectAndWait(*mutex, p->sema, timeout, FALSE);
- if (res == WAIT_FAILED) return set_win32_errno(GetLastError());
-
- /* Re-acquire lock to avoid race conditions. */
- EnterCriticalSection(&p->waiters_count_lock);
-
- /* We're no longer waiting... */
- p->waiters_count--;
-
- /* Check to see if we're the last waiter after <pthread_cond_broadcast>. */
- last_waiter = p->was_broadcast && p->waiters_count == 0;
-
- LeaveCriticalSection(&p->waiters_count_lock);
-
- /* If we're the last waiter thread during this particular broadcast */
- /* then let all the other threads proceed. */
- if (last_waiter) {
- /* This call atomically signals the <waiters_done> event and waits until */
- /* it can acquire the <mutex>. This is required to ensure fairness. */
- DWORD err = SignalObjectAndWait(p->waiters_done, *mutex, INFINITE, FALSE);
- if (err == WAIT_FAILED) return set_win32_errno(GetLastError());
- }
- else {
- /* Always regain the external mutex since that's the guarantee we */
- /* give to our callers. */
- DWORD err = WaitForSingleObject(*mutex, INFINITE);
- if (err == WAIT_FAILED) return set_win32_errno(GetLastError());
- }
-
- if (res == WAIT_TIMEOUT) return errno = ETIMEDOUT;
- assert(res == WAIT_OBJECT_0);
- return 0;
-}
-
-int pthread_cond_signal(pthread_cond_t * cond) {
- int have_waiters = 0;
- PThreadCond * p = (PThreadCond *)*cond;
-
- EnterCriticalSection(&p->waiters_count_lock);
- have_waiters = p->waiters_count > 0;
- LeaveCriticalSection(&p->waiters_count_lock);
-
- /* If there aren't any waiters, then this is a no-op. */
- if (have_waiters) {
- if (!ReleaseSemaphore(p->sema, 1, 0)) return set_win32_errno(GetLastError());
- }
- return 0;
-}
-
-int pthread_cond_broadcast(pthread_cond_t * cond) {
- int have_waiters = 0;
- PThreadCond * p = (PThreadCond *)*cond;
-
- /* This is needed to ensure that <waiters_count_> and <was_broadcast_> are */
- /* consistent relative to each other. */
- EnterCriticalSection(&p->waiters_count_lock);
-
- if (p->waiters_count > 0) {
- /* We are broadcasting, even if there is just one waiter... */
- /* Record that we are broadcasting, which helps optimize */
- /* <pthread_cond_wait> for the non-broadcast case. */
- p->was_broadcast = 1;
- have_waiters = 1;
- }
-
- if (have_waiters) {
- /* Wake up all the waiters atomically. */
- if (!ReleaseSemaphore(p->sema, p->waiters_count, 0)) return set_win32_errno(GetLastError());
-
- LeaveCriticalSection(&p->waiters_count_lock);
-
- /* Wait for all the awakened threads to acquire the counting */
- /* semaphore. */
- if (WaitForSingleObject(p->waiters_done, INFINITE) == WAIT_FAILED) return set_win32_errno(GetLastError());
- /* This assignment is okay, even without the <waiters_count_lock_> held */
- /* because no other waiter threads can wake up to access it. */
- p->was_broadcast = 0;
- }
- else {
- LeaveCriticalSection(&p->waiters_count_lock);
- }
- return 0;
-}
-
-int pthread_cond_destroy(pthread_cond_t * cond) {
- PThreadCond * p = (PThreadCond *)*cond;
-
- DeleteCriticalSection(&p->waiters_count_lock);
- if (!CloseHandle(p->sema)) return set_win32_errno(GetLastError());
- if (!CloseHandle(p->waiters_done)) return set_win32_errno(GetLastError());
-
- loc_free(p);
- *cond = NULL;
- return 0;
-}
-
-typedef struct ThreadArgs ThreadArgs;
-
-struct ThreadArgs {
- void * (*start)(void *);
- void * args;
-};
-
-static void start_thread(void * x) {
- ThreadArgs a = *(ThreadArgs *)x;
-
- loc_free(x);
- ExitThread((DWORD)a.start(a.args));
-}
-
-int pthread_create(pthread_t * res, const pthread_attr_t * attr,
- void * (*start)(void *), void * args) {
- HANDLE thread = NULL;
- DWORD thread_id = 0;
- ThreadArgs * a = (ThreadArgs *)loc_alloc(sizeof(ThreadArgs));
-
- a->start = start;
- a->args = args;
- thread = CreateThread(0, 0, (LPTHREAD_START_ROUTINE)start_thread, a, 0, &thread_id);
- if (thread == NULL) {
- int err = set_win32_errno(GetLastError());
- loc_free(a);
- return errno = err;
- }
- if (!CloseHandle(thread)) return set_win32_errno(GetLastError());
- *res = (pthread_t)thread_id;
- return 0;
-}
-
-int pthread_join(pthread_t thread_id, void ** value_ptr) {
- int error = 0;
- HANDLE thread = OpenThread(SYNCHRONIZE | THREAD_QUERY_INFORMATION, FALSE, (DWORD)thread_id);
-
- if (thread == NULL) return set_win32_errno(GetLastError());
- if (WaitForSingleObject(thread, INFINITE) == WAIT_FAILED) error = set_win32_errno(GetLastError());
- if (!error && value_ptr != NULL && !GetExitCodeThread(thread, (LPDWORD)value_ptr)) error = set_win32_errno(GetLastError());
- if (!CloseHandle(thread) && !error) error = set_win32_errno(GetLastError());
- return error;
-}
-
-int pthread_detach(pthread_t thread_id) {
- return 0;
-}
-
-pthread_t pthread_self(void) {
- return (pthread_t)GetCurrentThreadId();
-}
-
-int pthread_equal(pthread_t thread1, pthread_t thread2) {
- return thread1 == thread2;
-}
-
-int pthread_attr_init(pthread_attr_t * attr) {
- *attr = NULL;
- return 0;
-}
-
-#endif

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