/usr/include/mozjs-24/jsalloc.h is in libmozjs-24-dev 24.2.0-3ubuntu2.
This file is owned by root:root, with mode 0o644.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 | /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
* vim: set ts=8 sts=4 et sw=4 tw=99:
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef jsalloc_h
#define jsalloc_h
#include "js/Utility.h"
struct JSContext;
namespace js {
/*
* Allocation policies. These model the concept:
* - public copy constructor, assignment, destructor
* - void *malloc_(size_t)
* Responsible for OOM reporting on NULL return value.
* - void *calloc_(size_t)
* Responsible for OOM reporting on NULL return value.
* - void *realloc_(size_t)
* Responsible for OOM reporting on NULL return value.
* The *used* bytes of the previous buffer is passed in
* (rather than the old allocation size), in addition to
* the *new* allocation size requested.
* - void free_(void *)
* - reportAllocOverflow()
* Called on overflow before the container returns NULL.
*/
/* Policy for using system memory functions and doing no error reporting. */
class SystemAllocPolicy
{
public:
void *malloc_(size_t bytes) { return js_malloc(bytes); }
void *calloc_(size_t bytes) { return js_calloc(bytes); }
void *realloc_(void *p, size_t oldBytes, size_t bytes) { return js_realloc(p, bytes); }
void free_(void *p) { js_free(p); }
void reportAllocOverflow() const {}
};
/*
* Allocation policy that calls the system memory functions and reports errors
* to the context. Since the JSContext given on construction is stored for
* the lifetime of the container, this policy may only be used for containers
* whose lifetime is a shorter than the given JSContext.
*
* FIXME bug 647103 - rewrite this in terms of temporary allocation functions,
* not the system ones.
*/
class TempAllocPolicy
{
JSContext *const cx_;
/*
* Non-inline helper to call JSRuntime::onOutOfMemory with minimal
* code bloat.
*/
JS_FRIEND_API(void *) onOutOfMemory(void *p, size_t nbytes);
public:
TempAllocPolicy(JSContext *cx) : cx_(cx) {}
JSContext *context() const {
return cx_;
}
void *malloc_(size_t bytes) {
void *p = js_malloc(bytes);
if (JS_UNLIKELY(!p))
p = onOutOfMemory(NULL, bytes);
return p;
}
void *calloc_(size_t bytes) {
void *p = js_calloc(bytes);
if (JS_UNLIKELY(!p))
p = onOutOfMemory(NULL, bytes);
return p;
}
void *realloc_(void *p, size_t oldBytes, size_t bytes) {
void *p2 = js_realloc(p, bytes);
if (JS_UNLIKELY(!p2))
p2 = onOutOfMemory(p2, bytes);
return p2;
}
void free_(void *p) {
js_free(p);
}
JS_FRIEND_API(void) reportAllocOverflow() const;
};
} /* namespace js */
#endif /* jsalloc_h */
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