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author | Christopher Faylor <me@cgf.cx> | 2000-02-17 19:39:52 +0000 |
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committer | Christopher Faylor <me@cgf.cx> | 2000-02-17 19:39:52 +0000 |
commit | 8a0efa53e44919bcf5ccb1d3353618a82afdf8bc (patch) | |
tree | 68c3dbf3f2c6fd5d49777def9914d77b5cd4589d /newlib/libc/stdlib/mlock.c | |
parent | 1fd5e000ace55b323124c7e556a7a864b972a5c4 (diff) | |
download | newlib-8a0efa53e44919bcf5ccb1d3353618a82afdf8bc.zip newlib-8a0efa53e44919bcf5ccb1d3353618a82afdf8bc.tar.gz newlib-8a0efa53e44919bcf5ccb1d3353618a82afdf8bc.tar.bz2 |
import newlib-2000-02-17 snapshot
Diffstat (limited to 'newlib/libc/stdlib/mlock.c')
-rw-r--r-- | newlib/libc/stdlib/mlock.c | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/newlib/libc/stdlib/mlock.c b/newlib/libc/stdlib/mlock.c new file mode 100644 index 0000000..e7f7242 --- /dev/null +++ b/newlib/libc/stdlib/mlock.c @@ -0,0 +1,50 @@ +/* +FUNCTION +<<__malloc_lock>>, <<__malloc_unlock>>--lock malloc pool + +INDEX + __malloc_lock +INDEX + __malloc_unlock + +ANSI_SYNOPSIS + #include <malloc.h> + void __malloc_lock (void *<[reent]>); + void __malloc_unlock (void *<[reent]>); + +TRAD_SYNOPSIS + void __malloc_lock(<[reent]>) + char *<[reent]>; + + void __malloc_unlock(<[reent]>) + char *<[reent]>; + +DESCRIPTION +The <<malloc>> family of routines call these functions when they need +to lock the memory pool. The version of these routines supplied in +the library does not do anything. If multiple threads of execution +can call <<malloc>>, or if <<malloc>> 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 <<malloc>> may call <<__malloc_lock>> recursively; that is, +the sequence of calls may go <<__malloc_lock>>, <<__malloc_lock>>, +<<__malloc_unlock>>, <<__malloc_unlock>>. Any implementation of these +routines must be careful to avoid causing a thread to wait for a lock +that it already holds. +*/ + +#include <malloc.h> + +void +__malloc_lock (ptr) + struct _reent *ptr; +{ +} + +void +__malloc_unlock (ptr) + struct _reent *ptr; +{ +} |