call_once once_flag ONCE_FLAG_INIT p99_call_once P99_DECLARE_INIT_ONCE P99_DECLARE_ONCE_CHAIN P99_DEFINE_ONCE_CHAIN P99_INIT_CHAIN P99_INIT_ONCE P99_MUTUAL_EXCLUDE p99_once_flag thrd2str THRD2STR thrd_t_destroy thrd_t_init

P99_INIT_CHAIN #define P99_INIT_CHAIN (   T )    p99_call_once(&P99_PASTE3(p99_, T, _once), P99_PASTE3(p99_, T, _once).p00_init) Ensure that the function that was defined with P99_DEFINE_ONCE_CHAIN has been called exactly once before proceeding. Such a call could be placed at the beginning of a user function to ensure that a shared resource is always initialized before its use. A better strategy though would be to call P99_INIT_CHAIN from main, e.g., before any threads of the application are started, or through the mechanism provided by :::P99_INIT_FUNCTION. See also P99_DECLARE_ONCE_CHAIN P99_DEFINE_ONCE_CHAIN Definition at line 291 of file p99_threads.h.