pthread barriers are not implemented in OS X

[BohuTANG]

@leo-yuriev
@pmwkaa

Ioarena is broken on OS X, errors are as follow:

src/ia.h:16:2: error: unknown type name 'pthread_barrier_t'
  pthread_barrier_t barrier_start;

Here is an implementation:
http://blog.albertarmea.com/post/47089939939/using-pthreadbarrier-on-mac-os-x

[erthink]

Could someone check on a Mac ?

[BohuTANG]

@leo-yuriev
Y.
Sophia & nessDB & others SEs is cross-platform compatible.
Most hackers prefer Macs.

[erthink]

OK ;)

Please close issue if done.

[erthink]

Could we close this issue and merge b8854d4 (the devel branch) into master ?

[BohuTANG]

pthread_barrier_t is OK.
But still has problem with clock_gettime:

ioarena/src/ia_histogram.c:29:2: error: implicit declaration of function 'clock_gettime' [-Werror=implicit-function-declaration]
  int rc = clock_gettime(CLOCK_ID, &ts);
  ^
ioarena/src/ia_histogram.c:16:19: error: 'CLOCK_REALTIME' undeclared (first use in this function)
 # define CLOCK_ID CLOCK_REALTIME
                   ^
ioarena/src/ia_histogram.c:29:25: note: in expansion of macro 'CLOCK_ID'
  int rc = clock_gettime(CLOCK_ID, &ts);
                         ^

[erthink]

I'm closing this issue, but added the #13