diff options
Diffstat (limited to 'newlib/libc/stdlib/envlock.c')
| -rw-r--r-- | newlib/libc/stdlib/envlock.c | 34 |
1 files changed, 12 insertions, 22 deletions
diff --git a/newlib/libc/stdlib/envlock.c b/newlib/libc/stdlib/envlock.c index 74c85a8f5..8e55de288 100644 --- a/newlib/libc/stdlib/envlock.c +++ b/newlib/libc/stdlib/envlock.c @@ -1,6 +1,6 @@ /* FUNCTION -<<__env_lock>>, <<__env_unlock>>---lock environ variable +<<__env_lock>>, <<__env_unlock>>--lock environ variable INDEX __env_lock @@ -9,24 +9,24 @@ INDEX ANSI_SYNOPSIS #include "envlock.h" - void __env_lock (struct _reent *<[reent]>); - void __env_unlock (struct _reent *<[reent]>); + void __env_lock (struct _reent *<[reent]>); + void __env_unlock (struct _reent *<[reent]>); TRAD_SYNOPSIS void __env_lock(<[reent]>) - struct _reent *<[reent]>; + struct _reent *<[reent]>; void __env_unlock(<[reent]>) - struct _reent *<[reent]>; + struct _reent *<[reent]>; DESCRIPTION -The <<setenv>> family of routines call these functions when they need to -modify the environ variable. The version of these routines supplied in the -library use the lock API defined in sys/lock.h. If multiple threads of -execution can call <<setenv>>, or if <<setenv>> can be called reentrantly, -then you need to define your own versions of these functions in order to -safely lock the memory pool during a call. If you do not, the memory pool -may become corrupted. +The <<setenv>> family of routines call these functions when they need +to modify the environ variable. The version of these routines supplied +in the library does not do anything. If multiple threads of execution +can call <<setenv>>, or if <<setenv>> can be called reentrantly, then +you need to define your own versions of these functions in order to +safely lock the memory pool during a call. If you do not, the memory +pool may become corrupted. A call to <<setenv>> may call <<__env_lock>> recursively; that is, the sequence of calls may go <<__env_lock>>, <<__env_lock>>, @@ -36,26 +36,16 @@ that it already holds. */ #include "envlock.h" -#include <sys/lock.h> -#ifndef __SINGLE_THREAD__ -__LOCK_INIT_RECURSIVE(static, __env_lock_object); -#endif void __env_lock (ptr) struct _reent *ptr; { -#ifndef __SINGLE_THREAD__ - __lock_acquire_recursive (__env_lock_object); -#endif } void __env_unlock (ptr) struct _reent *ptr; { -#ifndef __SINGLE_THREAD__ - __lock_release_recursive (__env_lock_object); -#endif } |