Refactor thread condition logic
* Add better return value checks * Combine logic blocks in structs * Add (easier to read) static functions for blocks * Use condition variables only in combination with BOOL
This commit is contained in:
parent
ad20e431cc
commit
833a445e4e
@ -127,14 +127,190 @@ static int ThreadGetFd(HANDLE handle)
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return pThread->event.fds[0];
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}
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#define run_mutex_init(fkt, mux, arg) run_mutex_init_(fkt, #fkt, mux, arg)
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static BOOL run_mutex_init_(int (*fkt)(pthread_mutex_t*, const pthread_mutexattr_t*),
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const char* name, pthread_mutex_t* mutex,
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const pthread_mutexattr_t* mutexattr)
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{
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int rc;
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WINPR_ASSERT(fkt);
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WINPR_ASSERT(mutex);
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rc = fkt(mutex, mutexattr);
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if (rc != 0)
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{
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WLog_WARN(TAG, "[%s] failed with [%s]", name, strerror(rc));
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}
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return rc == 0;
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}
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#define run_mutex_fkt(fkt, mux) run_mutex_fkt_(fkt, #fkt, mux)
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static BOOL run_mutex_fkt_(int (*fkt)(pthread_mutex_t* mux), const char* name,
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pthread_mutex_t* mutex)
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{
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int rc;
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WINPR_ASSERT(fkt);
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WINPR_ASSERT(mutex);
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rc = fkt(mutex);
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if (rc != 0)
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{
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WLog_WARN(TAG, "[%s] failed with [%s]", name, strerror(rc));
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}
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return rc == 0;
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}
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#define run_cond_init(fkt, cond, arg) run_cond_init_(fkt, #fkt, cond, arg)
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static BOOL run_cond_init_(int (*fkt)(pthread_cond_t*, const pthread_condattr_t*), const char* name,
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pthread_cond_t* condition, const pthread_condattr_t* conditionattr)
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{
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int rc;
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WINPR_ASSERT(fkt);
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WINPR_ASSERT(condition);
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rc = fkt(condition, conditionattr);
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if (rc != 0)
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{
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WLog_WARN(TAG, "[%s] failed with [%s]", name, strerror(rc));
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}
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return rc == 0;
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}
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#define run_cond_fkt(fkt, cond) run_cond_fkt_(fkt, #fkt, cond)
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static BOOL run_cond_fkt_(int (*fkt)(pthread_cond_t* mux), const char* name,
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pthread_cond_t* condition)
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{
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int rc;
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WINPR_ASSERT(fkt);
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WINPR_ASSERT(condition);
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rc = fkt(condition);
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if (rc != 0)
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{
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WLog_WARN(TAG, "[%s] failed with [%s]", name, strerror(rc));
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}
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return rc == 0;
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}
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static int pthread_mutex_checked_unlock(pthread_mutex_t* mutex)
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{
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WINPR_ASSERT(mutex);
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WINPR_ASSERT(pthread_mutex_trylock(mutex) == EBUSY);
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return pthread_mutex_unlock(mutex);
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}
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static BOOL mux_condition_bundle_init(mux_condition_bundle* bundle)
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{
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WINPR_ASSERT(bundle);
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bundle->val = FALSE;
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if (!run_mutex_init(pthread_mutex_init, &bundle->mux, NULL))
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return FALSE;
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if (!run_cond_init(pthread_cond_init, &bundle->cond, NULL))
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return FALSE;
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return TRUE;
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}
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static void mux_condition_bundle_uninit(mux_condition_bundle* bundle)
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{
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mux_condition_bundle empty = { 0 };
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WINPR_ASSERT(bundle);
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run_cond_fkt(pthread_cond_destroy, &bundle->cond);
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run_mutex_fkt(pthread_mutex_destroy, &bundle->mux);
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*bundle = empty;
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}
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static BOOL mux_condition_bundle_signal(mux_condition_bundle* bundle)
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{
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BOOL rc = TRUE;
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WINPR_ASSERT(bundle);
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if (!run_mutex_fkt(pthread_mutex_lock, &bundle->mux))
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return FALSE;
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bundle->val = TRUE;
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if (!run_cond_fkt(pthread_cond_signal, &bundle->cond))
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rc = FALSE;
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if (!run_mutex_fkt(pthread_mutex_checked_unlock, &bundle->mux))
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rc = FALSE;
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return rc;
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}
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static BOOL mux_condition_bundle_lock(mux_condition_bundle* bundle)
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{
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WINPR_ASSERT(bundle);
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return run_mutex_fkt(pthread_mutex_lock, &bundle->mux);
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}
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static BOOL mux_condition_bundle_unlock(mux_condition_bundle* bundle)
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{
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WINPR_ASSERT(bundle);
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return run_mutex_fkt(pthread_mutex_checked_unlock, &bundle->mux);
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}
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static BOOL mux_condition_bundle_wait(mux_condition_bundle* bundle, const char* name)
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{
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BOOL rc = FALSE;
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WINPR_ASSERT(bundle);
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WINPR_ASSERT(name);
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WINPR_ASSERT(pthread_mutex_trylock(&bundle->mux) == EBUSY);
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while (!bundle->val)
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{
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int r = pthread_cond_wait(&bundle->cond, &bundle->mux);
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if (r != 0)
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{
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WLog_ERR(TAG, "failed to wait for %s [%s]", name, strerror(r));
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switch (r)
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{
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case ENOTRECOVERABLE:
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case EPERM:
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case ETIMEDOUT:
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case EINVAL:
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goto fail;
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default:
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break;
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}
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}
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}
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rc = bundle->val;
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fail:
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return rc;
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}
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static BOOL signal_thread_ready(WINPR_THREAD* thread)
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{
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WINPR_ASSERT(thread);
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return mux_condition_bundle_signal(&thread->isCreated);
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}
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static BOOL signal_thread_is_running(WINPR_THREAD* thread)
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{
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WINPR_ASSERT(thread);
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return mux_condition_bundle_signal(&thread->isRunning);
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}
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static DWORD ThreadCleanupHandle(HANDLE handle)
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{
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DWORD status = WAIT_FAILED;
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WINPR_THREAD* thread = (WINPR_THREAD*)handle;
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if (!ThreadIsHandled(handle))
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return WAIT_FAILED;
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if (pthread_mutex_lock(&thread->mutex))
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if (!run_mutex_fkt(pthread_mutex_lock, &thread->mutex))
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return WAIT_FAILED;
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if (!thread->joined)
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@ -145,17 +321,19 @@ static DWORD ThreadCleanupHandle(HANDLE handle)
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if (status != 0)
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{
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WLog_ERR(TAG, "pthread_join failure: [%d] %s", status, strerror(status));
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pthread_mutex_unlock(&thread->mutex);
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return WAIT_FAILED;
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goto fail;
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}
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else
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thread->joined = TRUE;
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}
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if (pthread_mutex_unlock(&thread->mutex))
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status = WAIT_OBJECT_0;
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fail:
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if (!run_mutex_fkt(pthread_mutex_checked_unlock, &thread->mutex))
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return WAIT_FAILED;
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return WAIT_OBJECT_0;
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return status;
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}
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static HANDLE_OPS ops = { ThreadIsHandled,
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@ -286,12 +464,43 @@ out:
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return TRUE;
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}
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static BOOL signal_and_wait_for_ready(WINPR_THREAD* thread)
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{
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BOOL res = FALSE;
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WINPR_ASSERT(thread);
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if (!mux_condition_bundle_lock(&thread->isRunning))
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return FALSE;
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if (!signal_thread_ready(thread))
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goto fail;
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if (!mux_condition_bundle_wait(&thread->isRunning, "threadIsRunning"))
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goto fail;
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#if defined(WITH_THREAD_LIST)
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if (!ListDictionary_Contains(thread_list, &thread->thread))
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{
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WLog_ERR(TAG, "Thread not in thread_list, startup failed!");
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goto fail;
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}
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#endif
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res = TRUE;
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fail:
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if (!mux_condition_bundle_unlock(&thread->isRunning))
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return FALSE;
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return res;
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}
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/* Thread launcher function responsible for registering
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* cleanup handlers and calling pthread_exit, if not done
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* in thread function. */
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static void* thread_launcher(void* arg)
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{
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struct timespec waittime = { 1, 0 };
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DWORD rc = 0;
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WINPR_THREAD* thread = (WINPR_THREAD*)arg;
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LPTHREAD_START_ROUTINE fkt;
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@ -314,27 +523,7 @@ static void* thread_launcher(void* arg)
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goto exit;
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}
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if (pthread_mutex_lock(&thread->threadIsReadyMutex))
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goto exit;
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if (pthread_cond_signal(&thread->threadReady) != 0)
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{
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WLog_ERR(TAG, "The thread could not be made ready");
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pthread_mutex_unlock(&thread->threadIsReadyMutex);
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goto exit;
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}
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pthread_cond_timedwait(&thread->threadIsReady, &thread->threadIsReadyMutex, &waittime);
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#if defined(WITH_THREAD_LIST)
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if (!ListDictionary_Contains(thread_list, &thread->thread))
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{
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WLog_ERR(TAG, "Thread not in thread_list, startup failed!");
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pthread_mutex_unlock(&thread->threadIsReadyMutex);
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goto exit;
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}
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#endif
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if (pthread_mutex_unlock(&thread->threadIsReadyMutex))
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if (!signal_and_wait_for_ready(thread))
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goto exit;
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rc = fkt(thread->lpParameter);
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@ -349,7 +538,8 @@ exit:
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set_event(thread);
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pthread_cond_signal(&thread->threadReady);
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signal_thread_ready(thread);
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if (thread->detached || !thread->started)
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cleanup_handle(thread);
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}
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@ -359,8 +549,14 @@ exit:
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static BOOL winpr_StartThread(WINPR_THREAD* thread)
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{
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struct timespec waittime = { 1, 0 };
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pthread_attr_t attr;
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BOOL rc = FALSE;
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BOOL locked = FALSE;
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pthread_attr_t attr = { 0 };
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if (!mux_condition_bundle_lock(&thread->isCreated))
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return FALSE;
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locked = TRUE;
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pthread_attr_init(&attr);
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pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_JOINABLE);
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@ -370,41 +566,44 @@ static BOOL winpr_StartThread(WINPR_THREAD* thread)
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thread->started = TRUE;
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reset_event(thread);
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if (pthread_mutex_lock(&thread->threadReadyMutex))
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goto error;
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#if defined(WITH_THREAD_LIST)
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if (!ListDictionary_Add(thread_list, &thread->thread, thread))
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{
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WLog_ERR(TAG, "failed to add the thread to the thread list");
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pthread_mutex_unlock(&thread->threadReadyMutex);
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goto error;
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}
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#endif
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if (pthread_create(&thread->thread, &attr, thread_launcher, thread))
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{
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pthread_mutex_unlock(&thread->threadReadyMutex);
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goto error;
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}
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pthread_cond_timedwait(&thread->threadReady, &thread->threadReadyMutex, &waittime);
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if (pthread_mutex_unlock(&thread->threadReadyMutex))
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goto error;
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if (pthread_cond_signal(&thread->threadIsReady) != 0)
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if (!mux_condition_bundle_wait(&thread->isCreated, "threadIsCreated"))
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goto error;
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locked = FALSE;
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if (!mux_condition_bundle_unlock(&thread->isCreated))
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goto error;
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if (!signal_thread_is_running(thread))
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{
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WLog_ERR(TAG, "failed to signal the thread was ready");
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goto error;
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}
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pthread_attr_destroy(&attr);
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dump_thread(thread);
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return TRUE;
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rc = TRUE;
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error:
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if (locked)
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{
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if (!mux_condition_bundle_unlock(&thread->isCreated))
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rc = FALSE;
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}
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pthread_attr_destroy(&attr);
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return FALSE;
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if (rc)
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dump_thread(thread);
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return rc;
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}
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HANDLE CreateThread(LPSECURITY_ATTRIBUTES lpThreadAttributes, SIZE_T dwStackSize,
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@ -433,7 +632,7 @@ HANDLE CreateThread(LPSECURITY_ATTRIBUTES lpThreadAttributes, SIZE_T dwStackSize
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goto fail;
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}
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if (pthread_mutex_init(&thread->mutex, NULL) != 0)
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if (!run_mutex_init(pthread_mutex_init, &thread->mutex, NULL))
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{
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WLog_ERR(TAG, "failed to initialize thread mutex");
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goto fail;
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@ -445,28 +644,10 @@ HANDLE CreateThread(LPSECURITY_ATTRIBUTES lpThreadAttributes, SIZE_T dwStackSize
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goto fail;
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}
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if (pthread_mutex_init(&thread->threadIsReadyMutex, NULL) != 0)
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{
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WLog_ERR(TAG, "failed to initialize a mutex for a condition variable");
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if (!mux_condition_bundle_init(&thread->isCreated))
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goto fail;
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}
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if (pthread_mutex_init(&thread->threadReadyMutex, NULL) != 0)
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{
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WLog_ERR(TAG, "failed to initialize a mutex for a condition variable");
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if (!mux_condition_bundle_init(&thread->isRunning))
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goto fail;
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}
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if (pthread_cond_init(&thread->threadIsReady, NULL) != 0)
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{
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WLog_ERR(TAG, "failed to initialize a condition variable");
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goto fail;
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}
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if (pthread_cond_init(&thread->threadReady, NULL) != 0)
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{
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WLog_ERR(TAG, "failed to initialize a condition variable");
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goto fail;
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}
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WINPR_HANDLE_SET_TYPE_AND_MODE(thread, HANDLE_TYPE_THREAD, WINPR_FD_READ);
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handle = (HANDLE)thread;
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@ -492,7 +673,6 @@ fail:
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void cleanup_handle(void* obj)
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{
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int rc;
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WINPR_THREAD* thread = (WINPR_THREAD*)obj;
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if (!thread)
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return;
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@ -500,29 +680,9 @@ void cleanup_handle(void* obj)
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if (!apc_uninit(&thread->apc))
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WLog_ERR(TAG, "failed to destroy APC");
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rc = pthread_cond_destroy(&thread->threadIsReady);
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if (rc)
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WLog_ERR(TAG, "failed to destroy thread->threadIsReady [%d] %s (%d)", rc, strerror(errno),
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errno);
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rc = pthread_cond_destroy(&thread->threadReady);
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if (rc)
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WLog_ERR(TAG, "failed to destroy thread->threadReady [%d] %s (%d)", rc, strerror(errno),
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errno);
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rc = pthread_mutex_destroy(&thread->threadIsReadyMutex);
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if (rc)
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WLog_ERR(TAG, "failed to destroy thread->threadIsReadyMutex [%d] %s (%d)", rc,
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strerror(errno), errno);
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rc = pthread_mutex_destroy(&thread->threadReadyMutex);
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if (rc)
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WLog_ERR(TAG, "failed to destroy thread->threadReadyMutex [%d] %s (%d)", rc,
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strerror(errno), errno);
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rc = pthread_mutex_destroy(&thread->mutex);
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if (rc)
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WLog_ERR(TAG, "failed to destroy thread->mutex [%d] %s (%d)", rc, strerror(errno), errno);
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mux_condition_bundle_uninit(&thread->isCreated);
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mux_condition_bundle_uninit(&thread->isRunning);
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run_mutex_fkt(pthread_mutex_destroy, &thread->mutex);
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winpr_event_uninit(&thread->event);
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@ -747,21 +907,21 @@ DWORD ResumeThread(HANDLE hThread)
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thread = (WINPR_THREAD*)Object;
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if (pthread_mutex_lock(&thread->mutex))
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if (!run_mutex_fkt(pthread_mutex_lock, &thread->mutex))
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return (DWORD)-1;
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if (!thread->started)
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{
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if (!winpr_StartThread(thread))
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{
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pthread_mutex_unlock(&thread->mutex);
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run_mutex_fkt(pthread_mutex_checked_unlock, &thread->mutex);
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return (DWORD)-1;
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}
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}
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else
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WLog_WARN(TAG, "Thread already started!");
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if (pthread_mutex_unlock(&thread->mutex))
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if (!run_mutex_fkt(pthread_mutex_checked_unlock, &thread->mutex))
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return (DWORD)-1;
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return 0;
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@ -799,7 +959,7 @@ BOOL TerminateThread(HANDLE hThread, DWORD dwExitCode)
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thread->exited = TRUE;
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thread->dwExitCode = dwExitCode;
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if (pthread_mutex_lock(&thread->mutex))
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if (!run_mutex_fkt(pthread_mutex_lock, &thread->mutex))
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return FALSE;
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#ifndef ANDROID
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@ -808,7 +968,7 @@ BOOL TerminateThread(HANDLE hThread, DWORD dwExitCode)
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WLog_ERR(TAG, "Function not supported on this platform!");
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#endif
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if (pthread_mutex_unlock(&thread->mutex))
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if (!run_mutex_fkt(pthread_mutex_checked_unlock, &thread->mutex))
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return FALSE;
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|
||||
set_event(thread);
|
||||
|
@ -32,34 +32,49 @@
|
||||
#include "../synch/event.h"
|
||||
#include "apc.h"
|
||||
|
||||
#ifdef __GNUC__
|
||||
#define ALIGN64 __attribute__((aligned(8)))
|
||||
#else
|
||||
#ifdef _WIN32
|
||||
#define ALIGN64 __declspec(align(8))
|
||||
#else
|
||||
#define ALIGN64
|
||||
#endif
|
||||
#endif
|
||||
|
||||
typedef void* (*pthread_start_routine)(void*);
|
||||
typedef struct winpr_APC_item WINPR_APC_ITEM;
|
||||
|
||||
typedef struct
|
||||
{
|
||||
ALIGN64 pthread_mutex_t mux;
|
||||
ALIGN64 pthread_cond_t cond;
|
||||
ALIGN64 BOOL val;
|
||||
} mux_condition_bundle;
|
||||
|
||||
struct winpr_thread
|
||||
{
|
||||
WINPR_HANDLE_DEF();
|
||||
|
||||
BOOL started;
|
||||
WINPR_EVENT_IMPL event;
|
||||
BOOL mainProcess;
|
||||
BOOL detached;
|
||||
BOOL joined;
|
||||
BOOL exited;
|
||||
DWORD dwExitCode;
|
||||
pthread_t thread;
|
||||
SIZE_T dwStackSize;
|
||||
LPVOID lpParameter;
|
||||
pthread_mutex_t mutex;
|
||||
pthread_mutex_t threadIsReadyMutex;
|
||||
pthread_cond_t threadIsReady;
|
||||
pthread_mutex_t threadReadyMutex;
|
||||
pthread_cond_t threadReady;
|
||||
LPTHREAD_START_ROUTINE lpStartAddress;
|
||||
LPSECURITY_ATTRIBUTES lpThreadAttributes;
|
||||
APC_QUEUE apc;
|
||||
ALIGN64 BOOL started;
|
||||
ALIGN64 WINPR_EVENT_IMPL event;
|
||||
ALIGN64 BOOL mainProcess;
|
||||
ALIGN64 BOOL detached;
|
||||
ALIGN64 BOOL joined;
|
||||
ALIGN64 BOOL exited;
|
||||
ALIGN64 DWORD dwExitCode;
|
||||
ALIGN64 pthread_t thread;
|
||||
ALIGN64 SIZE_T dwStackSize;
|
||||
ALIGN64 LPVOID lpParameter;
|
||||
ALIGN64 pthread_mutex_t mutex;
|
||||
mux_condition_bundle isRunning;
|
||||
mux_condition_bundle isCreated;
|
||||
ALIGN64 LPTHREAD_START_ROUTINE lpStartAddress;
|
||||
ALIGN64 LPSECURITY_ATTRIBUTES lpThreadAttributes;
|
||||
ALIGN64 APC_QUEUE apc;
|
||||
#if defined(WITH_DEBUG_THREADS)
|
||||
void* create_stack;
|
||||
void* exit_stack;
|
||||
ALIGN64 void* create_stack;
|
||||
ALIGN64 void* exit_stack;
|
||||
#endif
|
||||
};
|
||||
|
||||
|
Loading…
Reference in New Issue
Block a user