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Revert "Adding a high-resolution timer to platform win32."

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This reverts r12651.

Review URL: https://codereview.chromium.org/11033014

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@12652 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
This commit is contained in:
jkummerow@chromium.org 2012-10-02 11:07:26 +00:00
parent bdc466422b
commit e0c7d8301f
1 changed files with 1 additions and 12 deletions
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13
src/platform-win32.cc
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@ -591,16 +591,8 @@ double OS::TimeCurrentMillis() {
return t.ToJSTime();
}
static LARGE_INTEGER frequency = 0;
// Returns the tickcounter based on QueryPerformanceCounter or timeGetTime.
// Returns the tickcounter based on timeGetTime.
int64_t OS::Ticks() {
static LARGE_INTEGER tick;
if (frequency != 0 && QueryPerformanceCounter(&tick)) {
return static_cast<int64_t>(tick.QuadPart * 1e6 / frequency->QuadPart);
}
return timeGetTime() * 1000; // Convert to microseconds.
}
@ -2095,15 +2087,12 @@ void OS::SetUp() {
// call this setup code within the same millisecond.
uint64_t seed = static_cast<uint64_t>(TimeCurrentMillis());
srand(static_cast<unsigned int>(seed));
// Get the number of ticks per second that is used in OS::Ticks()
QueryPerformanceFrequency(&frequency);
limit_mutex = CreateMutex();
SamplerThread::SetUp();
}
void OS::TearDown() {
frequency = 0;
SamplerThread::TearDown();
delete limit_mutex;
}