diff options
| author | John Baldwin <jhb@FreeBSD.org> | 2009-12-17 20:41:27 +0000 |
|---|---|---|
| committer | John Baldwin <jhb@FreeBSD.org> | 2009-12-17 20:41:27 +0000 |
| commit | 5ff95453ccdf27240d470a7b6a2eb6ecc9935e37 (patch) | |
| tree | d48bca09cea15105f9638836288a08334d4c16cd /lib/libc/include | |
| parent | 1eea4693c3246a7cb6313f15f75e0e48dc5d2f56 (diff) | |
MFC 199606, 199614:
Add an internal _once() method. This works identical to pthread_once(3)
with the additional property that it is safe for routines in libc to use
in both single-threaded and multi-threaded processes. Multi-threaded
processes use the pthread_once() implementation from the threading library
while single-threaded processes use a simplified "stub" version internal
to libc.
Notes
svn path=/stable/8/; revision=200648
Diffstat (limited to 'lib/libc/include')
| -rw-r--r-- | lib/libc/include/libc_private.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/lib/libc/include/libc_private.h b/lib/libc/include/libc_private.h index 50903f3c74fa..052eb13003bb 100644 --- a/lib/libc/include/libc_private.h +++ b/lib/libc/include/libc_private.h @@ -34,6 +34,7 @@ #ifndef _LIBC_PRIVATE_H_ #define _LIBC_PRIVATE_H_ +#include <sys/_pthreadtypes.h> /* * This global flag is non-zero when a process has created one @@ -147,6 +148,12 @@ int _yp_check(char **); void _init_tls(void); /* + * Provides pthread_once()-like functionality for both single-threaded + * and multi-threaded applications. + */ +int _once(pthread_once_t *, void (*)(void)); + +/* * Set the TLS thread pointer */ void _set_tp(void *tp); |