28e2075280
trunk/talk git-svn-id: http://webrtc.googlecode.com/svn/trunk@4318 4adac7df-926f-26a2-2b94-8c16560cd09d
130 lines
4.0 KiB
C++
130 lines
4.0 KiB
C++
/*
|
|
* libjingle
|
|
* Copyright 2008, Google Inc.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions are met:
|
|
*
|
|
* 1. Redistributions of source code must retain the above copyright notice,
|
|
* this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright notice,
|
|
* this list of conditions and the following disclaimer in the documentation
|
|
* and/or other materials provided with the distribution.
|
|
* 3. The name of the author may not be used to endorse or promote products
|
|
* derived from this software without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
|
|
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
|
|
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
|
|
* EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
|
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
|
|
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
|
|
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
|
|
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
|
|
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
|
|
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
#include "talk/base/timing.h"
|
|
#include "talk/base/timeutils.h"
|
|
|
|
#if defined(POSIX)
|
|
#include <errno.h>
|
|
#include <math.h>
|
|
#include <sys/time.h>
|
|
#if defined(OSX)
|
|
#include <mach/mach.h>
|
|
#include <mach/clock.h>
|
|
#endif
|
|
#elif defined(WIN32)
|
|
#include <sys/timeb.h>
|
|
#include "talk/base/win32.h"
|
|
#endif
|
|
|
|
namespace talk_base {
|
|
|
|
Timing::Timing() {
|
|
#if defined(WIN32)
|
|
// This may fail, but we handle failure gracefully in the methods
|
|
// that use it (use alternative sleep method).
|
|
//
|
|
// TODO: Make it possible for user to tell if IdleWait will
|
|
// be done at lesser resolution because of this.
|
|
timer_handle_ = CreateWaitableTimer(NULL, // Security attributes.
|
|
FALSE, // Manual reset?
|
|
NULL); // Timer name.
|
|
#endif
|
|
}
|
|
|
|
Timing::~Timing() {
|
|
#if defined(WIN32)
|
|
if (timer_handle_ != NULL)
|
|
CloseHandle(timer_handle_);
|
|
#endif
|
|
}
|
|
|
|
double Timing::WallTimeNow() {
|
|
#if defined(POSIX)
|
|
struct timeval time;
|
|
gettimeofday(&time, NULL);
|
|
// Convert from second (1.0) and microsecond (1e-6).
|
|
return (static_cast<double>(time.tv_sec) +
|
|
static_cast<double>(time.tv_usec) * 1.0e-6);
|
|
|
|
#elif defined(WIN32)
|
|
struct _timeb time;
|
|
_ftime(&time);
|
|
// Convert from second (1.0) and milliseconds (1e-3).
|
|
return (static_cast<double>(time.time) +
|
|
static_cast<double>(time.millitm) * 1.0e-3);
|
|
#endif
|
|
}
|
|
|
|
double Timing::TimerNow() {
|
|
return (static_cast<double>(TimeNanos()) / kNumNanosecsPerSec);
|
|
}
|
|
|
|
double Timing::BusyWait(double period) {
|
|
double start_time = TimerNow();
|
|
while (TimerNow() - start_time < period) {
|
|
}
|
|
return TimerNow() - start_time;
|
|
}
|
|
|
|
double Timing::IdleWait(double period) {
|
|
double start_time = TimerNow();
|
|
|
|
#if defined(POSIX)
|
|
double sec_int, sec_frac = modf(period, &sec_int);
|
|
struct timespec ts;
|
|
ts.tv_sec = static_cast<time_t>(sec_int);
|
|
ts.tv_nsec = static_cast<long>(sec_frac * 1.0e9); // NOLINT
|
|
|
|
// NOTE(liulk): for the NOLINT above, long is the appropriate POSIX
|
|
// type.
|
|
|
|
// POSIX nanosleep may be interrupted by signals.
|
|
while (nanosleep(&ts, &ts) == -1 && errno == EINTR) {
|
|
}
|
|
|
|
#elif defined(WIN32)
|
|
if (timer_handle_ != NULL) {
|
|
LARGE_INTEGER due_time;
|
|
|
|
// Negative indicates relative time. The unit is 100 nanoseconds.
|
|
due_time.QuadPart = -LONGLONG(period * 1.0e7);
|
|
|
|
SetWaitableTimer(timer_handle_, &due_time, 0, NULL, NULL, TRUE);
|
|
WaitForSingleObject(timer_handle_, INFINITE);
|
|
} else {
|
|
// Still attempts to sleep with lesser resolution.
|
|
// The unit is in milliseconds.
|
|
Sleep(DWORD(period * 1.0e3));
|
|
}
|
|
#endif
|
|
|
|
return TimerNow() - start_time;
|
|
}
|
|
|
|
} // namespace talk_base
|