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Partial commit: Utilities

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Nekotekina 2016-02-02 00:55:43 +03:00
parent 5fc6f59821
commit 250ce63527
37 changed files with 4783 additions and 4007 deletions
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51
Utilities/Platform.cpp Normal file
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#include "Platform.h"
#ifdef __APPLE__
#include <sys/types.h>
#include <sys/_types/_timespec.h>
#include <mach/mach.h>
#include <mach/clock.h>
#include <mach/mach_time.h>
#undef CPU_STATE_MAX
#define MT_NANO (+1.0E-9)
#define MT_GIGA UINT64_C(1000000000)
// TODO create a list of timers,
static double mt_timebase = 0.0;
static uint64_t mt_timestart = 0;
// TODO be more careful in a multithreaded environement
int clock_gettime(clockid_t clk_id, struct timespec *tp)
{
kern_return_t retval = KERN_SUCCESS;
if( clk_id == TIMER_ABSTIME)
{
if (!mt_timestart) { // only one timer, initilized on the first call to the TIMER
mach_timebase_info_data_t tb = { 0 };
mach_timebase_info(&tb);
mt_timebase = tb.numer;
mt_timebase /= tb.denom;
mt_timestart = mach_absolute_time();
}
double diff = (mach_absolute_time() - mt_timestart) * mt_timebase;
tp->tv_sec = diff * MT_NANO;
tp->tv_nsec = diff - (tp->tv_sec * MT_GIGA);
}
else // other clk_ids are mapped to the coresponding mach clock_service
{
clock_serv_t cclock;
mach_timespec_t mts;
host_get_clock_service(mach_host_self(), clk_id, &cclock);
retval = clock_get_time(cclock, &mts);
mach_port_deallocate(mach_task_self(), cclock);
tp->tv_sec = mts.tv_sec;
tp->tv_nsec = mts.tv_nsec;
}
return retval;
}
#endif /* __APPLE__ */