Adding upstream version 14.2.upstream/14.2upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 254 insertions, 0 deletions

diff --git a/src/pulsecore/thread-posix.c b/src/pulsecore/thread-posix.c
new file mode 100644
index 0000000..62b0ec4
--- /dev/null
+++ b/src/pulsecore/thread-posix.c
@@ -0,0 +1,254 @@
+/***
+  This file is part of PulseAudio.
+
+  Copyright 2006 Lennart Poettering
+  Copyright 2006 Pierre Ossman <ossman@cendio.se> for Cendio AB
+
+  PulseAudio is free software; you can redistribute it and/or modify
+  it under the terms of the GNU Lesser General Public License as published
+  by the Free Software Foundation; either version 2.1 of the License,
+  or (at your option) any later version.
+
+  PulseAudio is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with PulseAudio; if not, see <http://www.gnu.org/licenses/>.
+***/
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <pthread.h>
+#include <sched.h>
+#include <errno.h>
+
+#ifdef __linux__
+#include <sys/prctl.h>
+#endif
+
+#include <pulse/xmalloc.h>
+#include <pulsecore/atomic.h>
+#include <pulsecore/macro.h>
+
+#include "thread.h"
+
+struct pa_thread {
+    pthread_t id;
+    pa_thread_func_t thread_func;
+    void *userdata;
+    pa_atomic_t running;
+    bool joined;
+    char *name;
+};
+
+struct pa_tls {
+    pthread_key_t key;
+};
+
+static void thread_free_cb(void *p) {
+    pa_thread *t = p;
+
+    pa_assert(t);
+
+    if (!t->thread_func) {
+        /* This is a foreign thread, we need to free the struct */
+        pa_xfree(t->name);
+        pa_xfree(t);
+    }
+}
+
+PA_STATIC_TLS_DECLARE(current_thread, thread_free_cb);
+
+static void* internal_thread_func(void *userdata) {
+    pa_thread *t = userdata;
+    pa_assert(t);
+
+#ifdef __linux__
+    prctl(PR_SET_NAME, t->name);
+#elif defined(HAVE_PTHREAD_SETNAME_NP) && defined(OS_IS_DARWIN)
+    pthread_setname_np(t->name);
+#endif
+
+    t->id = pthread_self();
+
+    PA_STATIC_TLS_SET(current_thread, t);
+
+    pa_atomic_inc(&t->running);
+    t->thread_func(t->userdata);
+    pa_atomic_sub(&t->running, 2);
+
+    return NULL;
+}
+
+pa_thread* pa_thread_new(const char *name, pa_thread_func_t thread_func, void *userdata) {
+    pa_thread *t;
+
+    pa_assert(thread_func);
+
+    t = pa_xnew0(pa_thread, 1);
+    t->name = pa_xstrdup(name);
+    t->thread_func = thread_func;
+    t->userdata = userdata;
+
+    if (pthread_create(&t->id, NULL, internal_thread_func, t) < 0) {
+        pa_xfree(t);
+        return NULL;
+    }
+
+    pa_atomic_inc(&t->running);
+
+    return t;
+}
+
+int pa_thread_is_running(pa_thread *t) {
+    pa_assert(t);
+
+    /* Unfortunately there is no way to tell whether a "foreign"
+     * thread is still running. See
+     * http://udrepper.livejournal.com/16844.html for more
+     * information */
+    pa_assert(t->thread_func);
+
+    return pa_atomic_load(&t->running) > 0;
+}
+
+void pa_thread_free(pa_thread *t) {
+    pa_assert(t);
+
+    pa_thread_join(t);
+
+    pa_xfree(t->name);
+    pa_xfree(t);
+}
+
+void pa_thread_free_nojoin(pa_thread *t) {
+    pa_assert(t);
+
+    pa_xfree(t->name);
+    pa_xfree(t);
+}
+
+int pa_thread_join(pa_thread *t) {
+    pa_assert(t);
+    pa_assert(t->thread_func);
+
+    if (t->joined)
+        return -1;
+
+    t->joined = true;
+    return pthread_join(t->id, NULL);
+}
+
+pa_thread* pa_thread_self(void) {
+    pa_thread *t;
+
+    if ((t = PA_STATIC_TLS_GET(current_thread)))
+        return t;
+
+    /* This is a foreign thread, let's create a pthread structure to
+     * make sure that we can always return a sensible pointer */
+
+    t = pa_xnew0(pa_thread, 1);
+    t->id = pthread_self();
+    t->joined = true;
+    pa_atomic_store(&t->running, 2);
+
+    PA_STATIC_TLS_SET(current_thread, t);
+
+    return t;
+}
+
+void* pa_thread_get_data(pa_thread *t) {
+    pa_assert(t);
+
+    return t->userdata;
+}
+
+void pa_thread_set_data(pa_thread *t, void *userdata) {
+    pa_assert(t);
+
+    t->userdata = userdata;
+}
+
+void pa_thread_set_name(pa_thread *t, const char *name) {
+    pa_assert(t);
+
+    pa_xfree(t->name);
+    t->name = pa_xstrdup(name);
+
+#ifdef __linux__
+    prctl(PR_SET_NAME, name);
+#elif defined(HAVE_PTHREAD_SETNAME_NP) && defined(OS_IS_DARWIN)
+    pthread_setname_np(name);
+#endif
+}
+
+const char *pa_thread_get_name(pa_thread *t) {
+    pa_assert(t);
+
+#ifdef __linux__
+    if (!t->name) {
+        t->name = pa_xmalloc(17);
+
+        if (prctl(PR_GET_NAME, t->name) >= 0)
+            t->name[16] = 0;
+        else {
+            pa_xfree(t->name);
+            t->name = NULL;
+        }
+    }
+#elif defined(HAVE_PTHREAD_GETNAME_NP) && defined(OS_IS_DARWIN)
+    if (!t->name) {
+        t->name = pa_xmalloc0(17);
+        pthread_getname_np(t->id, t->name, 16);
+    }
+#endif
+
+    return t->name;
+}
+
+void pa_thread_yield(void) {
+#ifdef HAVE_PTHREAD_YIELD
+    pthread_yield();
+#else
+    pa_assert_se(sched_yield() == 0);
+#endif
+}
+
+pa_tls* pa_tls_new(pa_free_cb_t free_cb) {
+    pa_tls *t;
+
+    t = pa_xnew(pa_tls, 1);
+
+    if (pthread_key_create(&t->key, free_cb) < 0) {
+        pa_xfree(t);
+        return NULL;
+    }
+
+    return t;
+}
+
+void pa_tls_free(pa_tls *t) {
+    pa_assert(t);
+
+    pa_assert_se(pthread_key_delete(t->key) == 0);
+    pa_xfree(t);
+}
+
+void *pa_tls_get(pa_tls *t) {
+    pa_assert(t);
+
+    return pthread_getspecific(t->key);
+}
+
+void *pa_tls_set(pa_tls *t, void *userdata) {
+    void *r;
+
+    r = pthread_getspecific(t->key);
+    pa_assert_se(pthread_setspecific(t->key, userdata) == 0);
+    return r;
+}