Merge "Add TEMP_FAILURE_RETRY macro for darwin"

#include <string.h>

#include <unistd.h>

/*

 * TEMP_FAILURE_RETRY is defined by some, but not all, versions of

 * <unistd.h>. (Alas, it is not as standard as we'd hoped!) So, if it's

 * not already defined, then define it here.

 */

#ifndef TEMP_FAILURE_RETRY

/* Used to retry syscalls that can return EINTR. */

#define TEMP_FAILURE_RETRY(exp) ({         \

    typeof (exp) _rc;                      \

    do {                                   \

        _rc = (exp);                       \

    } while (_rc == -1 && errno == EINTR); \

    _rc; })

#endif

#define OS_PATH_SEPARATOR '/'

#define OS_PATH_SEPARATOR_STR "/"