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author | Ulrich Drepper <drepper@redhat.com> | 2003-09-30 02:10:33 +0000 |
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committer | Ulrich Drepper <drepper@redhat.com> | 2003-09-30 02:10:33 +0000 |
commit | 3c6904fb49841a94395bcfe863eb6c8bf10a29d2 (patch) | |
tree | 7b31b14993bfc374b769e3a1130b3f20fd2da375 /sysdeps/generic/malloc-machine.h | |
parent | 28f532c89a76ef8ca50a8e3fbdc71894b4e97278 (diff) | |
download | glibc-3c6904fb49841a94395bcfe863eb6c8bf10a29d2.zip glibc-3c6904fb49841a94395bcfe863eb6c8bf10a29d2.tar.gz glibc-3c6904fb49841a94395bcfe863eb6c8bf10a29d2.tar.bz2 |
Update.
2003-09-27 Wolfram Gloger <wg@malloc.de>
* malloc/malloc.c: Include <malloc-machine.h> earlier instead of
"thread-m.h", so that default parameters can be overridden in a
system-specific malloc-machine.h. Remove extra ; from extern "C"
closing brace.
* sysdeps/generic/malloc-machine.h: New file.
* sysdeps/mach/hurd/malloc-machine.h: New file.
* malloc/thread-m.h: Removed.
* malloc/Makefile: Remove CFLAGS-malloc.c parameter addition, it
is in sysdeps/generic/malloc-machine.h now.
* elf/dl-reloc.c (_dl_allocate_static_tls): Move definition of
variables only used if TLS_TCB_AT_TP is defined into the #if
branch.
Diffstat (limited to 'sysdeps/generic/malloc-machine.h')
-rw-r--r-- | sysdeps/generic/malloc-machine.h | 68 |
1 files changed, 68 insertions, 0 deletions
diff --git a/sysdeps/generic/malloc-machine.h b/sysdeps/generic/malloc-machine.h new file mode 100644 index 0000000..3451370 --- /dev/null +++ b/sysdeps/generic/malloc-machine.h @@ -0,0 +1,68 @@ +/* Basic platform-independent macro definitions for mutexes, + thread-specific data and parameters for malloc. + Copyright (C) 2003 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 + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +#ifndef _GENERIC_MALLOC_MACHINE_H +#define _GENERIC_MALLOC_MACHINE_H + +#include <atomic.h> + +#ifndef mutex_init /* No threads, provide dummy macros */ + +# define NO_THREADS + +/* The mutex functions used to do absolutely nothing, i.e. lock, + trylock and unlock would always just return 0. However, even + without any concurrently active threads, a mutex can be used + legitimately as an `in use' flag. To make the code that is + protected by a mutex async-signal safe, these macros would have to + 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) + +typedef void *tsd_key_t; +# define tsd_key_create(key, destr) do {} while(0) +# define tsd_setspecific(key, data) ((key) = (data)) +# define tsd_getspecific(key, vptr) (vptr = (key)) + +# define thread_atfork(prepare, parent, child) do {} while(0) + +#endif /* !defined mutex_init */ + +#ifndef atomic_full_barrier +# define atomic_full_barrier() __asm ("" ::: "memory") +#endif + +#ifndef atomic_read_barrier +# define atomic_read_barrier() atomic_full_barrier () +#endif + +#ifndef atomic_write_barrier +# define atomic_write_barrier() atomic_full_barrier () +#endif + +#ifndef DEFAULT_TOP_PAD +# define DEFAULT_TOP_PAD 131072 +#endif + +#endif /* !defined(_GENERIC_MALLOC_MACHINE_H) */ |