timer_t missing on Mac OSX

[jeffhammond]

Even though timer_t is part of POSIX, it's missing from Mac OSX and references thereto are causing build errors of the form error: unknown type name 'timer_t'; did you mean 'time_t'?.

I have not found a trivial solution.

[jeffhammond]

Related to #9 and #333.

[Talbot3]

hi, macosx support it

// Path Here '/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/System/Library/Frameworks/Kernel.framework/Versions/A/Headers/sys/_types/_time_t.h'

#ifndef _TIME_T
#define _TIME_T
#include <machine/types.h> /* __darwin_time_t */
typedef __darwin_time_t         time_t;
#endif  /* _TIME_T */

macosx version: 11.14.5

[hiroyuki-sato]

Hello, @OrangeBook
Thank you for your information.
I'm porting OpenUCX to macOS. It helps for me.
hiroyuki-sato#4

But, macOS doesn't support timer_create function which use timer_t data type.

[Talbot3]

@hiroyuki-sato
your provide code have no time_t.
so you use it to check system have time_t right?
if you want to check which header file have time_t , then
run here bash code

cat  /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/System/Library/Frameworks/Kernel.framework/Versions/A/Headers/sys/_types/_time_t.h | grep time_t

[Talbot3]

suggest you add here code

#ifdef __APPLE__
#include "sys/_types/_time_t.h"
#endif

and add

gcc ... -I/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/System/Library/Frameworks/Kernel.framework/Versions/A/Headers/

or you can try gnulib

here ... is ellipsis

[hiroyuki-sato]

Hello, @OrangeBook. Thank you for your comment.

My point was

• timer_create function use timer_t data type.
• macOS doesn't support timer_create
• So timer_t data type will solve, but I have to use an alternative function
• gnulib may solve the missing function, but I don't want to use external libraries as much as possible.

ucx/src/ucs/async/signal.c

Lines 104 to 119 in cb508a0

	static ucs_status_t
	ucs_async_signal_sys_timer_create(int uid, pid_t tid, timer_t *sys_timer_id)
	{
	struct sigevent ev;
	timer_t timer;
	int ret;
	ucs_trace_func("tid=%d", tid);
	/* Create timer signal */
	memset(&ev, 0, sizeof(ev));
	ev.sigev_notify = SIGEV_THREAD_ID;
	ev.sigev_signo = ucs_global_opts.async_signo;
	ev.sigev_value.sival_int = uid; /* user parameter to timer */
	ev._sigev_un._tid = tid; /* target thread */
	ret = timer_create(CLOCK_REALTIME, &ev, &timer);

SYNOPSIS
       #include <signal.h>
       #include <time.h>

       int timer_create(clockid_t clockid, struct sigevent *sevp,
                        timer_t *timerid);

% grep -rl timer_create /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include
% 

[Talbot3]

yea, I found mixed timer_t and time_t.
sorry for it .