mirror of
https://gitlab.freedesktop.org/pulseaudio/pulseaudio.git
synced 2025-11-05 13:29:57 -05:00
port the threaded mainloop to our new abstract mutex/thread API
git-svn-id: file:///home/lennart/svn/public/pulseaudio/trunk@1369 fefdeb5f-60dc-0310-8127-8f9354f1896f
This commit is contained in:
Lennart Poettering
parent
8e7c2a3b0c
commit
813e95f3b8
2 changed files with 48 additions and 287 deletions
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@ -33,57 +33,31 @@
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#include "../pulsecore/poll.h"
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#endif
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#ifdef HAVE_PTHREAD
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#include <pthread.h>
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#endif
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#ifdef HAVE_WINDOWS_H
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#include <windows.h>
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#endif
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#include <pulse/xmalloc.h>
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#include <pulsecore/log.h>
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#include <pulsecore/hashmap.h>
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#include <pulsecore/thread.h>
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#include <pulsecore/mutex.h>
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#include "mainloop.h"
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#include "thread-mainloop.h"
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#if defined(HAVE_PTHREAD) || defined(OS_IS_WIN32)
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struct pa_threaded_mainloop {
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pa_mainloop *real_mainloop;
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int n_waiting;
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int thread_running;
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#ifdef OS_IS_WIN32
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DWORD thread_id;
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HANDLE thread;
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CRITICAL_SECTION mutex;
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pa_hashmap *cond_events;
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HANDLE accept_cond;
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#else
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pthread_t thread_id;
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pthread_mutex_t mutex;
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pthread_cond_t cond, accept_cond;
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#endif
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pa_thread* thread;
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pa_mutex* mutex;
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pa_cond* cond, *accept_cond;
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};
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static inline int in_worker(pa_threaded_mainloop *m) {
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#ifdef OS_IS_WIN32
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return GetCurrentThreadId() == m->thread_id;
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#else
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return pthread_equal(pthread_self(), m->thread_id);
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#endif
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return pa_thread_self() == m->thread;
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}
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static int poll_func(struct pollfd *ufds, unsigned long nfds, int timeout, void *userdata) {
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#ifdef OS_IS_WIN32
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CRITICAL_SECTION *mutex = userdata;
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#else
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pthread_mutex_t *mutex = userdata;
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#endif
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pa_mutex *mutex = userdata;
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int r;
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assert(mutex);
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@ -91,28 +65,14 @@ static int poll_func(struct pollfd *ufds, unsigned long nfds, int timeout, void
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/* Before entering poll() we unlock the mutex, so that
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* avahi_simple_poll_quit() can succeed from another thread. */
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#ifdef OS_IS_WIN32
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LeaveCriticalSection(mutex);
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#else
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pthread_mutex_unlock(mutex);
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#endif
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pa_mutex_unlock(mutex);
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r = poll(ufds, nfds, timeout);
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#ifdef OS_IS_WIN32
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EnterCriticalSection(mutex);
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#else
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pthread_mutex_lock(mutex);
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#endif
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pa_mutex_lock(mutex);
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return r;
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}
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#ifdef OS_IS_WIN32
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static DWORD WINAPI thread(void *userdata) {
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#else
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static void* thread(void *userdata) {
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#endif
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static void thread(void *userdata) {
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pa_threaded_mainloop *m = userdata;
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#ifndef OS_IS_WIN32
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@ -123,32 +83,15 @@ static void* thread(void *userdata) {
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pthread_sigmask(SIG_BLOCK, &mask, NULL);
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#endif
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#ifdef OS_IS_WIN32
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EnterCriticalSection(&m->mutex);
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#else
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pthread_mutex_lock(&m->mutex);
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#endif
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pa_mutex_lock(m->mutex);
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pa_mainloop_run(m->real_mainloop, NULL);
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#ifdef OS_IS_WIN32
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LeaveCriticalSection(&m->mutex);
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#else
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pthread_mutex_unlock(&m->mutex);
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#endif
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#ifdef OS_IS_WIN32
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return 0;
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#else
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return NULL;
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#endif
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pa_mutex_unlock(m->mutex);
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}
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pa_threaded_mainloop *pa_threaded_mainloop_new(void) {
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pa_threaded_mainloop *m;
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#ifndef OS_IS_WIN32
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pthread_mutexattr_t a;
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#endif
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m = pa_xnew(pa_threaded_mainloop, 1);
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@ -157,26 +100,13 @@ pa_threaded_mainloop *pa_threaded_mainloop_new(void) {
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return NULL;
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}
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pa_mainloop_set_poll_func(m->real_mainloop, poll_func, &m->mutex);
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m->mutex = pa_mutex_new(1);
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m->cond = pa_cond_new();
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m->accept_cond = pa_cond_new();
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m->thread = NULL;
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#ifdef OS_IS_WIN32
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InitializeCriticalSection(&m->mutex);
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pa_mainloop_set_poll_func(m->real_mainloop, poll_func, m->mutex);
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m->cond_events = pa_hashmap_new(NULL, NULL);
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assert(m->cond_events);
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m->accept_cond = CreateEvent(NULL, FALSE, FALSE, NULL);
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assert(m->accept_cond);
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#else
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pthread_mutexattr_init(&a);
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pthread_mutexattr_settype(&a, PTHREAD_MUTEX_RECURSIVE);
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pthread_mutex_init(&m->mutex, &a);
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pthread_mutexattr_destroy(&a);
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pthread_cond_init(&m->cond, NULL);
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pthread_cond_init(&m->accept_cond, NULL);
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#endif
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m->thread_running = 0;
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m->n_waiting = 0;
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return m;
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@ -186,22 +116,17 @@ void pa_threaded_mainloop_free(pa_threaded_mainloop* m) {
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assert(m);
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/* Make sure that this function is not called from the helper thread */
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assert(!m->thread_running || !in_worker(m));
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assert((m->thread && !pa_thread_is_running(m->thread)) || !in_worker(m));
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if (m->thread_running)
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pa_threaded_mainloop_stop(m);
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pa_threaded_mainloop_stop(m);
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if (m->real_mainloop)
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pa_mainloop_free(m->real_mainloop);
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pa_thread_free(m->thread);
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#ifdef OS_IS_WIN32
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pa_hashmap_free(m->cond_events, NULL, NULL);
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CloseHandle(m->accept_cond);
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#else
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pthread_mutex_destroy(&m->mutex);
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pthread_cond_destroy(&m->cond);
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pthread_cond_destroy(&m->accept_cond);
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#endif
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pa_mainloop_free(m->real_mainloop);
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pa_mutex_free(m->mutex);
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pa_cond_free(m->cond);
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pa_cond_free(m->accept_cond);
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pa_xfree(m);
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}
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@ -209,36 +134,10 @@ void pa_threaded_mainloop_free(pa_threaded_mainloop* m) {
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int pa_threaded_mainloop_start(pa_threaded_mainloop *m) {
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assert(m);
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assert(!m->thread_running);
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assert(!m->thread || !pa_thread_is_running(m->thread));
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#ifdef OS_IS_WIN32
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EnterCriticalSection(&m->mutex);
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m->thread = CreateThread(NULL, 0, thread, m, 0, &m->thread_id);
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if (!m->thread) {
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LeaveCriticalSection(&m->mutex);
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if (!(m->thread = pa_thread_new(thread, m)))
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return -1;
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}
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#else
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pthread_mutex_lock(&m->mutex);
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if (pthread_create(&m->thread_id, NULL, thread, m) < 0) {
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pthread_mutex_unlock(&m->mutex);
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return -1;
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}
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#endif
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m->thread_running = 1;
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#ifdef OS_IS_WIN32
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LeaveCriticalSection(&m->mutex);
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#else
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pthread_mutex_unlock(&m->mutex);
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#endif
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return 0;
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}
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@ -246,148 +145,55 @@ int pa_threaded_mainloop_start(pa_threaded_mainloop *m) {
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void pa_threaded_mainloop_stop(pa_threaded_mainloop *m) {
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assert(m);
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if (!m->thread_running)
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if (!m->thread || !pa_thread_is_running(m->thread))
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return;
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/* Make sure that this function is not called from the helper thread */
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assert(!in_worker(m));
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#ifdef OS_IS_WIN32
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EnterCriticalSection(&m->mutex);
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#else
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pthread_mutex_lock(&m->mutex);
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#endif
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pa_mutex_lock(m->mutex);
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pa_mainloop_quit(m->real_mainloop, 0);
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pa_mutex_unlock(m->mutex);
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#ifdef OS_IS_WIN32
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LeaveCriticalSection(&m->mutex);
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#else
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pthread_mutex_unlock(&m->mutex);
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#endif
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#ifdef OS_IS_WIN32
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WaitForSingleObject(m->thread, INFINITE);
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CloseHandle(m->thread);
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#else
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pthread_join(m->thread_id, NULL);
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#endif
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m->thread_running = 0;
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return;
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pa_thread_join(m->thread);
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}
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void pa_threaded_mainloop_lock(pa_threaded_mainloop *m) {
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assert(m);
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/* Make sure that this function is not called from the helper thread */
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assert(!m->thread_running || !in_worker(m));
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assert(!m->thread || !pa_thread_is_running(m->thread) || !in_worker(m));
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#ifdef OS_IS_WIN32
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EnterCriticalSection(&m->mutex);
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#else
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pthread_mutex_lock(&m->mutex);
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#endif
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pa_mutex_lock(m->mutex);
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}
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void pa_threaded_mainloop_unlock(pa_threaded_mainloop *m) {
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assert(m);
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/* Make sure that this function is not called from the helper thread */
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assert(!m->thread_running || !in_worker(m));
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assert(!m->thread || !pa_thread_is_running(m->thread) || !in_worker(m));
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#ifdef OS_IS_WIN32
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LeaveCriticalSection(&m->mutex);
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#else
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pthread_mutex_unlock(&m->mutex);
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#endif
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pa_mutex_unlock(m->mutex);
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}
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void pa_threaded_mainloop_signal(pa_threaded_mainloop *m, int wait_for_accept) {
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#ifdef OS_IS_WIN32
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void *iter;
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const void *key;
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HANDLE event;
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#endif
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assert(m);
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#ifdef OS_IS_WIN32
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pa_cond_signal(m->cond, 1);
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iter = NULL;
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while (1) {
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pa_hashmap_iterate(m->cond_events, &iter, &key);
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if (key == NULL)
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break;
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event = (HANDLE)pa_hashmap_get(m->cond_events, key);
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SetEvent(event);
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}
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#else
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pthread_cond_broadcast(&m->cond);
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#endif
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if (wait_for_accept && m->n_waiting > 0) {
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#ifdef OS_IS_WIN32
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/* This is just to make sure it's unsignaled */
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WaitForSingleObject(m->accept_cond, 0);
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LeaveCriticalSection(&m->mutex);
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WaitForSingleObject(m->accept_cond, INFINITE);
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EnterCriticalSection(&m->mutex);
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#else
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pthread_cond_wait(&m->accept_cond, &m->mutex);
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#endif
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}
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if (wait_for_accept && m->n_waiting > 0)
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pa_cond_wait(m->accept_cond, m->mutex);
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}
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void pa_threaded_mainloop_wait(pa_threaded_mainloop *m) {
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#ifdef OS_IS_WIN32
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HANDLE event;
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DWORD result;
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#endif
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assert(m);
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/* Make sure that this function is not called from the helper thread */
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assert(!m->thread_running || !in_worker(m));
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assert(!m->thread || !pa_thread_is_running(m->thread) || !in_worker(m));
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m->n_waiting ++;
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#ifdef OS_IS_WIN32
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event = CreateEvent(NULL, FALSE, FALSE, NULL);
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assert(event);
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pa_hashmap_put(m->cond_events, event, event);
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LeaveCriticalSection(&m->mutex);
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result = WaitForSingleObject(event, INFINITE);
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assert(result == WAIT_OBJECT_0);
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EnterCriticalSection(&m->mutex);
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pa_hashmap_remove(m->cond_events, event);
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CloseHandle(event);
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#else
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pthread_cond_wait(&m->cond, &m->mutex);
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#endif
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pa_cond_wait(m->cond, m->mutex);
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assert(m->n_waiting > 0);
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m->n_waiting --;
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@ -397,13 +203,9 @@ void pa_threaded_mainloop_accept(pa_threaded_mainloop *m) {
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assert(m);
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/* Make sure that this function is not called from the helper thread */
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assert(!m->thread_running || !in_worker(m));
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assert(!m->thread || !pa_thread_is_running(m->thread) || !in_worker(m));
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#ifdef OS_IS_WIN32
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SetEvent(m->accept_cond);
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#else
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pthread_cond_signal(&m->accept_cond);
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#endif
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pa_cond_signal(m->accept_cond, 0);
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}
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int pa_threaded_mainloop_get_retval(pa_threaded_mainloop *m) {
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@ -417,50 +219,3 @@ pa_mainloop_api* pa_threaded_mainloop_get_api(pa_threaded_mainloop*m) {
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return pa_mainloop_get_api(m->real_mainloop);
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}
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#else /* defined(OS_IS_WIN32) || defined(HAVE_PTHREAD) */
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pa_threaded_mainloop *pa_threaded_mainloop_new(void) {
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pa_log_error("Threaded main loop not supported on this platform");
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return NULL;
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}
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void pa_threaded_mainloop_free(pa_threaded_mainloop* m) {
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assert(0);
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}
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int pa_threaded_mainloop_start(pa_threaded_mainloop *m) {
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assert(0);
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return -1;
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}
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void pa_threaded_mainloop_stop(pa_threaded_mainloop *m) {
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assert(0);
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}
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void pa_threaded_mainloop_lock(pa_threaded_mainloop *m) {
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assert(0);
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}
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void pa_threaded_mainloop_unlock(pa_threaded_mainloop *m) {
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assert(0);
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}
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void pa_threaded_mainloop_wait(pa_threaded_mainloop *m) {
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assert(0);
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}
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void pa_threaded_mainloop_signal(pa_threaded_mainloop *m, int wait_for_release) {
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assert(0);
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}
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int pa_threaded_mainloop_get_retval(pa_threaded_mainloop *m) {
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assert(0);
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}
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pa_mainloop_api* pa_threaded_mainloop_get_api(pa_threaded_mainloop*m) {
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assert(0);
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return NULL;
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}
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#endif /* defined(OS_IS_WIN32) || defined(HAVE_PTHREAD) */
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