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-rw-r--r--src/util.h40
1 files changed, 40 insertions, 0 deletions
diff --git a/src/util.h b/src/util.h
index 61ff553539..f25a030f19 100644
--- a/src/util.h
+++ b/src/util.h
@@ -292,7 +292,47 @@ typedef CMutexLock<CCriticalSection> CCriticalBlock;
LeaveCritical(); \
}
+#ifdef MAC_OSX
+// boost::interprocess::interprocess_semaphore seems to spinlock on OSX; prefer polling instead
+class CSemaphore
+{
+private:
+ CCriticalSection cs;
+ int val;
+
+public:
+ CSemaphore(int init) : val(init) {}
+
+ void wait() {
+ do {
+ {
+ LOCK(cs);
+ if (val>0) {
+ val--;
+ return;
+ }
+ }
+ Sleep(100);
+ } while(1);
+ }
+
+ bool try_wait() {
+ LOCK(cs);
+ if (val>0) {
+ val--;
+ return true;
+ }
+ return false;
+ }
+
+ void post() {
+ LOCK(cs);
+ val++;
+ }
+};
+#else
typedef boost::interprocess::interprocess_semaphore CSemaphore;
+#endif
/** RAII-style semaphore lock */
class CSemaphoreGrant