- Fix delta time calculation in LinuxSemaphore::Wait.

Review URL: http://codereview.chromium.org/69024

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@1732 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

SConstruct

@@ -108,7 +108,7 @@ LIBRARY_FLAGS = {
     'os:linux': {
       'CCFLAGS':      ['-ansi'],
       'library:shared': {
-        'LIBS': ['pthread', 'rt']
+        'LIBS': ['pthread']
       }
     },
     'os:macos': {
@@ -224,7 +224,7 @@ V8_EXTRA_FLAGS = {
 MKSNAPSHOT_EXTRA_FLAGS = {
   'gcc': {
     'os:linux': {
-      'LIBS': ['pthread', 'rt'],
+      'LIBS': ['pthread'],
     },
     'os:macos': {
       'LIBS': ['pthread'],
@@ -269,7 +269,7 @@ CCTEST_EXTRA_FLAGS = {
       'LIBPATH': [abspath('.')]
     },
     'os:linux': {
-      'LIBS':         ['pthread', 'rt'],
+      'LIBS':         ['pthread'],
     },
     'os:macos': {
       'LIBS':         ['pthread'],
@@ -308,7 +308,7 @@ SAMPLE_FLAGS = {
       'CCFLAGS': ['-fno-rtti', '-fno-exceptions']
     },
     'os:linux': {
-      'LIBS':         ['pthread', 'rt'],
+      'LIBS':         ['pthread'],
     },
     'os:macos': {
       'LIBS':         ['pthread'],
@@ -388,7 +388,7 @@ D8_FLAGS = {
       'LIBS': ['readline']
     },
     'os:linux': {
-      'LIBS': ['pthread', 'rt'],
+      'LIBS': ['pthread'],
     },
     'os:macos': {
       'LIBS': ['pthread'],

src/platform-freebsd.cc

@@ -503,27 +503,24 @@ void FreeBSDSemaphore::Wait() {
 
 bool FreeBSDSemaphore::Wait(int timeout) {
   const long kOneSecondMicros = 1000000;  // NOLINT
-  const long kOneSecondNanos = 1000000000;  // NOLINT
 
   // Split timeout into second and nanosecond parts.
-  long nanos = (timeout % kOneSecondMicros) * 1000;  // NOLINT
-  time_t secs = timeout / kOneSecondMicros;
+  struct timeval delta;
+  delta.tv_usec = timeout % kOneSecondMicros;
+  delta.tv_sec = timeout / kOneSecondMicros;
 
-  // Get the current real time clock.
-  struct timespec ts;
-  if (clock_gettime(CLOCK_REALTIME, &ts) == -1) {
+  struct timeval current_time;
+  // Get the current time.
+  if (gettimeofday(&current_time, NULL) == -1) {
     return false;
   }
 
-  // Calculate realtime for end of timeout.
-  ts.tv_nsec += nanos;
-  if (ts.tv_nsec >= kOneSecondNanos) {
-    ts.tv_nsec -= kOneSecondNanos;
-    ts.tv_nsec++;
-  }
-  ts.tv_sec += secs;
+  // Calculate time for end of timeout.
+  struct timeval end_time;
+  timeradd(&current_time, &delta, &end_time);
 
-  // Wait for semaphore signalled or timeout.
+  struct timespec ts;
+  TIMEVAL_TO_TIMESPEC(&end_time, &ts);
   while (true) {
     int result = sem_timedwait(&sem_, &ts);
     if (result == 0) return true;  // Successfully got semaphore.

src/platform-linux.cc

@@ -509,26 +509,24 @@ void LinuxSemaphore::Wait() {
 
 bool LinuxSemaphore::Wait(int timeout) {
   const long kOneSecondMicros = 1000000;  // NOLINT
-  const long kOneSecondNanos = 1000000000;  // NOLINT
 
   // Split timeout into second and nanosecond parts.
-  long nanos = (timeout % kOneSecondMicros) * 1000;  // NOLINT
-  time_t secs = timeout / kOneSecondMicros;
+  struct timeval delta;
+  delta.tv_usec = timeout % kOneSecondMicros;
+  delta.tv_sec = timeout / kOneSecondMicros;
 
-  // Get the current realtime clock.
-  struct timespec ts;
-  if (clock_gettime(CLOCK_REALTIME, &ts) == -1) {
+  struct timeval current_time;
+  // Get the current time.
+  if (gettimeofday(&current_time, NULL) == -1) {
     return false;
   }
 
-  // Calculate real time for end of timeout.
-  ts.tv_nsec += nanos;
-  if (ts.tv_nsec >= kOneSecondNanos) {
-    ts.tv_nsec -= kOneSecondNanos;
-    ts.tv_nsec++;
-  }
-  ts.tv_sec += secs;
+  // Calculate time for end of timeout.
+  struct timeval end_time;
+  timeradd(&current_time, &delta, &end_time);
 
+  struct timespec ts;
+  TIMEVAL_TO_TIMESPEC(&end_time, &ts);
   // Wait for semaphore signalled or timeout.
   while (true) {
     int result = sem_timedwait(&sem_, &ts);