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Diffstat (limited to 'newlib/libc/stdlib/envlock.c')
-rw-r--r--newlib/libc/stdlib/envlock.c61
1 files changed, 0 insertions, 61 deletions
diff --git a/newlib/libc/stdlib/envlock.c b/newlib/libc/stdlib/envlock.c
deleted file mode 100644
index 24d0083be..000000000
--- a/newlib/libc/stdlib/envlock.c
+++ /dev/null
@@ -1,61 +0,0 @@
-/*
-FUNCTION
-<<__env_lock>>, <<__env_unlock>>--lock environ variable
-
-INDEX
- __env_lock
-INDEX
- __env_unlock
-
-ANSI_SYNOPSIS
- #include "envlock.h"
- void __env_lock (struct _reent *<[reent]>);
- void __env_unlock (struct _reent *<[reent]>);
-
-TRAD_SYNOPSIS
- void __env_lock(<[reent]>)
- struct _reent *<[reent]>;
-
- void __env_unlock(<[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.
-
-A call to <<setenv>> may call <<__env_lock>> recursively; that is,
-the sequence of calls may go <<__env_lock>>, <<__env_lock>>,
-<<__env_unlock>>, <<__env_unlock>>. Any implementation of these
-routines must be careful to avoid causing a thread to wait for a lock
-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
-}