Work around missing pthread_mutex_timedlock() as necessary

1 files changed, 33 insertions, 0 deletions

diff --git a/lib/timedlock.c b/lib/timedlock.c
new file mode 100644
index 000000000..997ef6235
--- /dev/null
+++ b/lib/timedlock.c
@@ -0,0 +1,33 @@
+#include "config.h"
+
+#include <errno.h>
+
+#define _x_min(a, b) ((a) < (b) ? (a) : (b))
+
+int xine_private_pthread_mutex_timedlock(pthread_mutex_t *mutex,
+                                         const struct timespec *abs_timeout)
+{
+    int             pthread_rc;
+    struct timespec remaining, slept, ts;
+
+    remaining = *abs_timeout;
+    while ((pthread_rc = pthread_mutex_trylock(mutex)) == EBUSY) {
+        ts.tv_sec  = 0;
+        ts.tv_nsec = (remaining.tv_sec > 0 ? 10000000
+                                           : _x_min(remaining.tv_nsec, 10000000));
+        nanosleep(&ts, &slept);
+        ts.tv_nsec -= slept.tv_nsec;
+        if (ts.tv_nsec <= remaining.tv_nsec) {
+            remaining.tv_nsec -= ts.tv_nsec;
+        }
+        else {
+            remaining.tv_sec--;
+            remaining.tv_nsec = (1000000 - (ts.tv_nsec - remaining.tv_nsec));
+        }
+        if (remaining.tv_sec < 0 || (!remaining.tv_sec && remaining.tv_nsec <= 0)) {
+            return ETIMEDOUT;
+        }
+    }
+
+    return pthread_rc;
+}