mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-11-05 00:25:27 +00:00
236 lines
5.2 KiB
C++
236 lines
5.2 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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* vim: sw=4 ts=4 et :
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*/
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include <errno.h>
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#include <new> // for std::bad_alloc
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#include <string.h>
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#include <sys/types.h>
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#if defined(MALLOC_H)
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# include MALLOC_H // for memalign, valloc where available
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#endif // if defined(MALLOC_H)
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#include <stddef.h> // for size_t
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#include <stdlib.h> // for malloc, free
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#if defined(XP_UNIX)
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# include <unistd.h> // for valloc on *BSD
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#endif //if defined(XP_UNIX)
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#if defined(__FreeBSD__)
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# include <malloc_np.h> // for malloc_usable_size
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#endif // if defined(__FreeBSD__)
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#if defined(XP_WIN) || (defined(XP_OS2) && defined(__declspec))
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# define MOZALLOC_EXPORT __declspec(dllexport)
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#endif
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// Make sure that "malloc" et al. resolve to their libc variants.
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#define MOZALLOC_DONT_DEFINE_MACRO_WRAPPERS
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#include "mozilla/mozalloc.h"
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#include "mozilla/mozalloc_oom.h" // for mozalloc_handle_oom
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/* Windows doesn't have malloc_usable_size, but jemalloc has */
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#if defined(MOZ_MEMORY_WINDOWS)
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extern "C" size_t malloc_usable_size(const void *ptr);
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#endif
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#if defined(__GNUC__) && (__GNUC__ > 2)
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#define LIKELY(x) (__builtin_expect(!!(x), 1))
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#define UNLIKELY(x) (__builtin_expect(!!(x), 0))
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#else
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#define LIKELY(x) (x)
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#define UNLIKELY(x) (x)
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#endif
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void
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moz_free(void* ptr)
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{
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free(ptr);
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}
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void*
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moz_xmalloc(size_t size)
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{
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void* ptr = malloc(size);
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if (UNLIKELY(!ptr && size)) {
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mozalloc_handle_oom(size);
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return moz_xmalloc(size);
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}
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return ptr;
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}
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void*
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moz_malloc(size_t size)
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{
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return malloc(size);
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}
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void*
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moz_xcalloc(size_t nmemb, size_t size)
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{
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void* ptr = calloc(nmemb, size);
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if (UNLIKELY(!ptr && nmemb && size)) {
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mozalloc_handle_oom(size);
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return moz_xcalloc(nmemb, size);
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}
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return ptr;
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}
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void*
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moz_calloc(size_t nmemb, size_t size)
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{
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return calloc(nmemb, size);
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}
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void*
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moz_xrealloc(void* ptr, size_t size)
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{
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void* newptr = realloc(ptr, size);
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if (UNLIKELY(!newptr && size)) {
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mozalloc_handle_oom(size);
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return moz_xrealloc(ptr, size);
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}
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return newptr;
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}
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void*
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moz_realloc(void* ptr, size_t size)
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{
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return realloc(ptr, size);
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}
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char*
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moz_xstrdup(const char* str)
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{
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char* dup = strdup(str);
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if (UNLIKELY(!dup)) {
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mozalloc_handle_oom(0);
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return moz_xstrdup(str);
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}
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return dup;
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}
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char*
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moz_strdup(const char* str)
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{
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return strdup(str);
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}
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#if defined(HAVE_STRNDUP)
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char*
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moz_xstrndup(const char* str, size_t strsize)
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{
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char* dup = strndup(str, strsize);
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if (UNLIKELY(!dup)) {
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mozalloc_handle_oom(strsize);
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return moz_xstrndup(str, strsize);
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}
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return dup;
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}
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char*
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moz_strndup(const char* str, size_t strsize)
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{
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return strndup(str, strsize);
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}
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#endif // if defined(HAVE_STRNDUP)
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#if defined(HAVE_POSIX_MEMALIGN)
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int
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moz_xposix_memalign(void **ptr, size_t alignment, size_t size)
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{
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int err = posix_memalign(ptr, alignment, size);
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if (UNLIKELY(err && ENOMEM == err)) {
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mozalloc_handle_oom(size);
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return moz_xposix_memalign(ptr, alignment, size);
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}
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// else: (0 == err) or (EINVAL == err)
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return err;
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}
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int
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moz_posix_memalign(void **ptr, size_t alignment, size_t size)
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{
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int code = posix_memalign(ptr, alignment, size);
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if (code)
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return code;
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#if defined(XP_MACOSX)
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// Workaround faulty OSX posix_memalign, which provides memory with the
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// incorrect alignment sometimes, but returns 0 as if nothing was wrong.
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size_t mask = alignment - 1;
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if (((size_t)(*ptr) & mask) != 0) {
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void* old = *ptr;
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code = moz_posix_memalign(ptr, alignment, size);
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free(old);
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}
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#endif
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return code;
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}
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#endif // if defined(HAVE_POSIX_MEMALIGN)
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#if defined(HAVE_MEMALIGN)
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void*
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moz_xmemalign(size_t boundary, size_t size)
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{
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void* ptr = memalign(boundary, size);
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if (UNLIKELY(!ptr && EINVAL != errno)) {
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mozalloc_handle_oom(size);
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return moz_xmemalign(boundary, size);
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}
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// non-NULL ptr or errno == EINVAL
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return ptr;
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}
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void*
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moz_memalign(size_t boundary, size_t size)
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{
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return memalign(boundary, size);
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}
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#endif // if defined(HAVE_MEMALIGN)
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#if defined(HAVE_VALLOC)
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void*
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moz_xvalloc(size_t size)
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{
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void* ptr = valloc(size);
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if (UNLIKELY(!ptr)) {
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mozalloc_handle_oom(size);
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return moz_xvalloc(size);
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}
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return ptr;
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}
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void*
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moz_valloc(size_t size)
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{
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return valloc(size);
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}
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#endif // if defined(HAVE_VALLOC)
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size_t
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moz_malloc_usable_size(void *ptr)
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{
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if (!ptr)
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return 0;
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#if defined(XP_MACOSX)
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return malloc_size(ptr);
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#elif defined(MOZ_MEMORY) || (defined(XP_LINUX) && !defined(ANDROID)) || defined(__FreeBSD__)
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// Android bionic libc doesn't have malloc_usable_size.
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return malloc_usable_size(ptr);
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#elif defined(XP_WIN)
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return _msize(ptr);
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#else
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return 0;
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#endif
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}
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size_t moz_malloc_size_of(const void *ptr)
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{
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return moz_malloc_usable_size((void *)ptr);
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}
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namespace mozilla {
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const fallible_t fallible = fallible_t();
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} // namespace mozilla
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