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#include "util/threadcputimer.h"
#if defined(Q_OS_MAC)
#include <sys/time.h>
#include <unistd.h>
#include <mach/mach_time.h>
#elif defined(Q_OS_SYMBIAN)
#include <e32std.h>
#include <sys/time.h>
#include <hal.h>
#include <hal_data.h>
#elif defined(Q_OS_UNIX)
#include <sys/time.h>
#include <time.h>
#include <unistd.h>
#elif defined(Q_OS_WIN)
#include <windows.h>
#endif
////////////////////////////// Unix //////////////////////////////
#if defined(Q_OS_UNIX)
#if (_POSIX_THREAD_CPUTIME-0 != 0)
static const bool threadCpuTimeChecked = true;
static const bool threadCpuTimeAvailable = _POSIX_THREAD_CPUTIME > 0;
#else
static int threadCpuTimeChecked = false;
static int threadCpuTimeAvailable = false;
#endif
#ifdef Q_CC_GNU
# define is_likely(x) __builtin_expect((x), 1)
#else
# define is_likely(x) (x)
#endif
#define load_acquire(x) ((volatile const int&)(x))
#define store_release(x,v) ((volatile int&)(x) = (v))
static void unixCheckClockType()
{
#if (_POSIX_THREAD_CPUTIME-0 == 0)
if (is_likely(load_acquire(threadCpuTimeChecked)))
return;
# if defined(_SC_THREAD_CPUTIME)
// detect if the system support monotonic timers
long x = sysconf(_SC_THREAD_CPUTIME);
store_release(threadCpuTimeAvailable, x >= 200112L);
# endif
store_release(threadCpuTimeChecked, true);
#endif
}
static inline void do_gettime(qint64 *sec, qint64 *frac)
{
#if (_POSIX_MONOTONIC_CLOCK-0 >= 0)
unixCheckClockType();
if (is_likely(threadCpuTimeAvailable)) {
timespec ts;
clock_gettime(CLOCK_THREAD_CPUTIME_ID, &ts);
*sec = ts.tv_sec;
*frac = ts.tv_nsec;
return;
}
#else
Q_UNUSED(threadCpuTimeChecked);
Q_UNUSED(threadCpuTimeAvailable);
Q_UNUSED(unixCheckClockType);
#endif
*sec = 0;
*frac = 0;
}
void ThreadCpuTimer::start()
{
do_gettime(&t1, &t2);
}
mixxx::Duration ThreadCpuTimer::elapsed() const
{
qint64 sec, frac;
do_gettime(&sec, &frac);
sec = sec - t1;
frac = frac - t2;
return mixxx::Duration::fromNanos(sec * Q_INT64_C(1000000000) + frac);
}
mixxx::Duration ThreadCpuTimer::restart()
{
qint64 sec, frac;
sec = t1;
frac = t2;
do_gettime(&t1, &t2);
sec = t1 - sec;
frac = t2 - frac;
return mixxx::Duration::fromNanos(sec * Q_INT64_C(1000000000) + frac);
}
////////////////////////////// Default //////////////////////////////
#else
// default implementation (no hi-perf timer) does nothing
void ThreadCpuTimer::start()
{
}
mixxx::Duration ThreadCpuTimer::elapsed() const
{
return mixxx::Duration::fromNanos(0);
}
mixxx::Duration ThreadCpuTimer::restart()
{
return mixxx::Duration::fromNanos(0);
}
#endif
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