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authorMax Kellermann <max@duempel.org>2008-04-12 04:14:25 +0000
committerEric Wong <normalperson@yhbt.net>2008-04-12 04:14:25 +0000
commit0146fbe3ceab96759f1e55e73daaa6d6d7bc4b9b (patch)
tree88d4b8a9d3d7014b9bb0763d7b86c08a19695307 /src/notify.c
parent38e0dafc4c1e71a5ff7a9d9563d80b096945f97b (diff)
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use the pthread API in notify.c
This patch rewrites notify.c to use the pthread API, namely pthread_mutex and pthread_cond. This is a lot cheaper and easier than the pipe() hack. git-svn-id: https://svn.musicpd.org/mpd/trunk@7280 09075e82-0dd4-0310-85a5-a0d7c8717e4f
Diffstat (limited to 'src/notify.c')
-rw-r--r--src/notify.c54
1 files changed, 37 insertions, 17 deletions
diff --git a/src/notify.c b/src/notify.c
index 4eda79391..5d53b231d 100644
--- a/src/notify.c
+++ b/src/notify.c
@@ -17,32 +17,52 @@
*/
#include "notify.h"
-#include "os_compat.h"
-#include "log.h"
-#include "utils.h"
-void notifyInit(Notify *notify)
+int notifyInit(Notify *notify)
{
- if (pipe(notify->fds) < 0)
- FATAL("Couldn't open pipe: %s", strerror(errno));
- if (set_nonblocking(notify->fds[1]) < 0)
- FATAL("Couldn't set non-blocking on notify fd: %s",
- strerror(errno));
+ int ret;
+
+ ret = pthread_mutex_init(&notify->mutex, NULL);
+ if (ret != 0)
+ return ret;
+
+ ret = pthread_cond_init(&notify->cond, NULL);
+ if (ret != 0) {
+ pthread_mutex_destroy(&notify->mutex);
+ return ret;
+ }
+
+ notify->pending = 0;
+
+ return 0;
}
-void notifyWait(Notify *notify)
+void notifyEnter(Notify *notify)
{
- char buffer[64];
+ pthread_mutex_lock(&notify->mutex);
+}
- if (read(notify->fds[0], buffer, sizeof(buffer)) < 0)
- FATAL("error reading from pipe: %s\n", strerror(errno));
+void notifyLeave(Notify *notify)
+{
+ pthread_mutex_unlock(&notify->mutex);
+}
+
+void notifyWait(Notify *notify)
+{
+ if (!notify->pending)
+ pthread_cond_wait(&notify->cond, &notify->mutex);
+ notify->pending = 0;
}
void notifySignal(Notify *notify)
{
- char buffer = 0;
+ notify->pending = 1;
+ pthread_cond_signal(&notify->cond);
+}
- if (write(notify->fds[1], &buffer, sizeof(buffer)) < 0 &&
- errno != EAGAIN && errno != EINTR)
- FATAL("error writing to pipe: %s\n", strerror(errno));
+void notifySignalSync(Notify *notify)
+{
+ pthread_mutex_lock(&notify->mutex);
+ notifySignal(notify);
+ pthread_mutex_unlock(&notify->mutex);
}