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Make malloc build for no-threads configurations.

This commit is contained in:
Roland McGrath 2012-08-17 11:29:45 -07:00
parent 2ae1ae5cf4
commit 750c1f2a9a
4 changed files with 25 additions and 12 deletions
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11
ChangeLog
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@ -1,10 +1,17 @@
2012-08-17 Roland McGrath <roland@hack.frob.com>
* sysdeps/generic/malloc-machine.h (MUTEX_INITIALIZER): New macro.
(atomic_full_barrier, atomic_read_barrier, atomic_write_barrier):
Macros removed.
* malloc/arena.c (save_malloc_hook, save_free_hook): Conditionalize on
[!NO_THREADS].
(malloc_atfork, free_atfork, atfork_recursive_cntr): Likewise.
(ptmalloc_lock_all, ptmalloc_unlock_all, ptmalloc_unlock_all2):
Likewise.
* elf/dl-iteratephdr.c (__dl_iterate_phdr): Use NULL rather than 0 for
__libc_cleanup_push argument.
2012-08-17 Roland McGrath <roland@hack.frob.com>
* bits/param.h: New file.
* misc/sys/param.h: New file.
* include/sys/param.h: New file.

12
malloc/arena.c
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@ -141,6 +141,8 @@ int __malloc_initialized = -1;
/**************************************************************************/
#ifndef NO_THREADS
/* atfork support. */
static __malloc_ptr_t (*save_malloc_hook) (size_t __size,
@ -276,7 +278,7 @@ ptmalloc_unlock_all (void)
(void)mutex_unlock(&list_lock);
}
#ifdef __linux__
# ifdef __linux__
/* In NPTL, unlocking a mutex in the child process after a
fork() is currently unsafe, whereas re-initializing it is safe and
@ -311,11 +313,13 @@ ptmalloc_unlock_all2 (void)
atfork_recursive_cntr = 0;
}
#else
# else
#define ptmalloc_unlock_all2 ptmalloc_unlock_all
# define ptmalloc_unlock_all2 ptmalloc_unlock_all
#endif
# endif
#endif /* !NO_THREADS */
/* Initialization routine. */
#include <string.h>

3
malloc/malloc.c
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@ -1075,9 +1075,10 @@ static void* realloc_check(void* oldmem, size_t bytes,
const void *caller);
static void* memalign_check(size_t alignment, size_t bytes,
const void *caller);
/* These routines are never needed in this configuration. */
#ifndef NO_THREADS
static void* malloc_atfork(size_t sz, const void *caller);
static void free_atfork(void* mem, const void *caller);
#endif
/* ------------- Optional versions of memcopy ---------------- */

11
sysdeps/generic/malloc-machine.h
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@ -1,6 +1,6 @@
/* Basic platform-independent macro definitions for mutexes,
thread-specific data and parameters for malloc.
Copyright (C) 2003 Free Software Foundation, Inc.
Copyright (C) 2003-2012 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
@ -34,10 +34,11 @@
be based on atomic test-and-set operations, for example. */
typedef int mutex_t;
# define mutex_init(m) (*(m) = 0)
# define mutex_lock(m) ((*(m) = 1), 0)
# define mutex_trylock(m) (*(m) ? 1 : ((*(m) = 1), 0))
# define mutex_unlock(m) (*(m) = 0)
# define mutex_init(m) (*(m) = 0)
# define mutex_lock(m) ((*(m) = 1), 0)
# define mutex_trylock(m) (*(m) ? 1 : ((*(m) = 1), 0))
# define mutex_unlock(m) (*(m) = 0)
# define MUTEX_INITIALIZER (0)
typedef void *tsd_key_t;
# define tsd_key_create(key, destr) do {} while(0)