зеркало из https://github.com/mozilla/gecko-dev.git
132 строки
3.1 KiB
C++
132 строки
3.1 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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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 <string.h>
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#include "mozmemory_wrap.h"
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#include "mozilla/Types.h"
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// Declare malloc implementation functions with the right return and
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// argument types.
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#define MALLOC_DECL(name, return_type, ...) \
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MOZ_MEMORY_API return_type name##_impl(__VA_ARGS__);
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#define MALLOC_FUNCS MALLOC_FUNCS_MALLOC
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#include "malloc_decls.h"
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#ifdef MOZ_WRAP_NEW_DELETE
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# include <new>
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MFBT_API void* operator new(size_t size) { return malloc_impl(size); }
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MFBT_API void* operator new[](size_t size) { return malloc_impl(size); }
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MFBT_API void operator delete(void* ptr) noexcept(true) { free_impl(ptr); }
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MFBT_API void operator delete[](void* ptr) noexcept(true) { free_impl(ptr); }
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MFBT_API void* operator new(size_t size, std::nothrow_t const&) {
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return malloc_impl(size);
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}
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MFBT_API void* operator new[](size_t size, std::nothrow_t const&) {
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return malloc_impl(size);
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}
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MFBT_API void operator delete(void* ptr, std::nothrow_t const&)noexcept(true) {
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free_impl(ptr);
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}
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MFBT_API void operator delete[](void* ptr,
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std::nothrow_t const&) noexcept(true) {
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free_impl(ptr);
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}
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#endif
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// strndup and strdup may be defined as macros in string.h, which would
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// clash with the definitions below.
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#undef strndup
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#undef strdup
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MOZ_MEMORY_API char* strndup_impl(const char* src, size_t len) {
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char* dst = (char*)malloc_impl(len + 1);
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if (dst) {
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strncpy(dst, src, len);
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dst[len] = '\0';
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}
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return dst;
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}
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MOZ_MEMORY_API char* strdup_impl(const char* src) {
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size_t len = strlen(src);
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return strndup_impl(src, len);
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}
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#ifdef ANDROID
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# include <stdarg.h>
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# include <stdio.h>
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MOZ_MEMORY_API int vasprintf_impl(char** str, const char* fmt, va_list ap) {
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char *ptr, *_ptr;
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int ret;
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if (str == NULL || fmt == NULL) {
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return -1;
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}
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ptr = (char*)malloc_impl(128);
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if (ptr == NULL) {
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*str = NULL;
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return -1;
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}
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ret = vsnprintf(ptr, 128, fmt, ap);
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if (ret < 0) {
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free_impl(ptr);
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*str = NULL;
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return -1;
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}
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_ptr = reinterpret_cast<char*>(realloc_impl(ptr, ret + 1));
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if (_ptr == NULL) {
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free_impl(ptr);
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*str = NULL;
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return -1;
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}
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*str = _ptr;
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return ret;
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}
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MOZ_MEMORY_API int asprintf_impl(char** str, const char* fmt, ...) {
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int ret;
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va_list ap;
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va_start(ap, fmt);
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ret = vasprintf_impl(str, fmt, ap);
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va_end(ap);
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return ret;
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}
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#endif
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#ifdef XP_WIN
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# include <wchar.h>
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// We also need to provide our own impl of wcsdup so that we don't ask
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// the CRT for memory from its heap (which will then be unfreeable).
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MOZ_MEMORY_API wchar_t* wcsdup_impl(const wchar_t* src) {
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size_t len = wcslen(src);
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wchar_t* dst = (wchar_t*)malloc_impl((len + 1) * sizeof(wchar_t));
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if (dst) wcsncpy(dst, src, len + 1);
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return dst;
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}
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MOZ_MEMORY_API void* _aligned_malloc_impl(size_t size, size_t alignment) {
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return memalign_impl(alignment, size);
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}
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#endif // XP_WIN
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