no POSIX timers on OSX

- unbreak OSX build

Closes #891

hphp/runtime/base/thread_info.cpp

@@ -124,9 +124,11 @@ void ThreadInfo::onSessionExit() {
 }
 
 RequestInjectionData::~RequestInjectionData() {
+#ifndef __APPLE__
   if (m_hasTimer) {
     timer_delete(m_timer_id);
   }
+#endif
 }
 
 void RequestInjectionData::onSessionInit() {
@@ -156,6 +158,7 @@ void RequestInjectionData::setSurprisePage(void* page) {
 }
 
 void RequestInjectionData::setTimeout(int seconds) {
+#ifndef __APPLE__
   m_timeoutSeconds = seconds > 0 ? seconds : 0;
   if (!m_hasTimer) {
     if (!m_timeoutSeconds) {
@@ -201,6 +204,7 @@ void RequestInjectionData::setTimeout(int seconds) {
   } else {
     m_timerActive.store(false, std::memory_order_relaxed);
   }
+#endif
 }
 
 void RequestInjectionData::resetTimer(int seconds /* = -1 */) {

hphp/runtime/base/types.h

@@ -229,7 +229,9 @@ public:
                        // protect for error conditions
 
  private:
+#ifndef __APPLE__
   timer_t m_timer_id;    // id of our timer
+#endif
   int m_timeoutSeconds;  // how many seconds to timeout
   bool m_hasTimer;       // Whether we've created our timer yet
   std::atomic<bool> m_timerActive;