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Add back Darwin/Mach/Apple portability

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Quite a few of the changes against the MalcolmRobb/dump1090 fork are
incompatible with OSX.  This patch adds back that cross platform support
back.
This commit is contained in:
David Stipp 2015-09-02 23:41:00 -04:00
parent ef34c4ce0f
commit ae126d1009
14 changed files with 324 additions and 10 deletions
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79
compat/clock_gettime/clock_gettime.c Normal file
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#ifdef __APPLE__
#include "clock_gettime.h"
#include <mach/clock.h> // for clock_get_time
#include <mach/clock_types.h> // for mach_timespec_t, CALENDAR_CLOCK, etc
#include <mach/kern_return.h> // for KERN_SUCCESS, kern_return_t
#include <mach/mach_host.h> // for host_get_clock_service
#include <mach/mach_init.h> // for mach_host_self
#include <mach/mach_types.h> // for clock_serv_t
#include <sched.h> // for sched_yield
#include <errno.h> // for EINVAL, errno
#include <unistd.h> // for getpid
int clock_gettime(clockid_t clk_id, struct timespec *tp)
{
kern_return_t ret;
clock_serv_t clk;
clock_id_t clk_serv_id;
mach_timespec_t tm;
uint64_t start, end, delta, nano;
/*
task_basic_info_data_t tinfo;
task_thread_times_info_data_t ttinfo;
mach_msg_type_number_t tflag;
*/
int retval = -1;
switch (clk_id)
{
case CLOCK_REALTIME:
case CLOCK_MONOTONIC:
clk_serv_id = clk_id == CLOCK_REALTIME ? CALENDAR_CLOCK : SYSTEM_CLOCK;
if (KERN_SUCCESS == (ret = host_get_clock_service(mach_host_self(), clk_serv_id, &clk)))
{
if (KERN_SUCCESS == (ret = clock_get_time(clk, &tm)))
{
tp->tv_sec = tm.tv_sec;
tp->tv_nsec = tm.tv_nsec;
retval = 0;
}
}
if (KERN_SUCCESS != ret)
{
errno = EINVAL;
retval = -1;
}
break;
case CLOCK_PROCESS_CPUTIME_ID:
case CLOCK_THREAD_CPUTIME_ID:
start = mach_absolute_time();
if (clk_id == CLOCK_PROCESS_CPUTIME_ID)
{
getpid();
}
else
{
sched_yield();
}
end = mach_absolute_time();
delta = end - start;
if (0 == __clock_gettime_inf.denom)
{
mach_timebase_info(&__clock_gettime_inf);
}
nano = delta * __clock_gettime_inf.numer / __clock_gettime_inf.denom;
tp->tv_sec = nano * 1e-9;
tp->tv_nsec = nano - (tp->tv_sec * 1e9);
retval = 0;
break;
default:
errno = EINVAL;
retval = -1;
}
return retval;
}
#endif // __APPLE__