LCOV - app.info - objdir/dist/include/jsalloc.h

LCOV - code coverage report
| Current view: | directory - objdir/dist/include - jsalloc.h (source / functions) |  | Found | Hit | Coverage |
| Test: | app.info | Lines: | 12 | 10 | 83.3 %
| Date: | 2012-04-21 | Functions: | 6 | 5 | 83.3 %

           1                 : /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
           2                 :  * vim: set ts=8 sw=4 et tw=99 ft=cpp:
           3                 :  *
           4                 :  * ***** BEGIN LICENSE BLOCK *****
           5                 :  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
           6                 :  *
           7                 :  * The contents of this file are subject to the Mozilla Public License Version
           8                 :  * 1.1 (the "License"); you may not use this file except in compliance with
           9                 :  * the License. You may obtain a copy of the License at
          10                 :  * http://www.mozilla.org/MPL/
          11                 :  *
          12                 :  * Software distributed under the License is distributed on an "AS IS" basis,
          13                 :  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
          14                 :  * for the specific language governing rights and limitations under the
          15                 :  * License.
          16                 :  *
          17                 :  * The Original Code is Mozilla SpiderMonkey JavaScript 1.9 code, released
          18                 :  * July 16, 2009.
          19                 :  *
          20                 :  * The Initial Developer of the Original Code is
          21                 :  *   the Mozilla Corporation.
          22                 :  *
          23                 :  * Contributor(s):
          24                 :  *
          25                 :  * Alternatively, the contents of this file may be used under the terms of
          26                 :  * either of the GNU General Public License Version 2 or later (the "GPL"),
          27                 :  * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
          28                 :  * in which case the provisions of the GPL or the LGPL are applicable instead
          29                 :  * of those above. If you wish to allow use of your version of this file only
          30                 :  * under the terms of either the GPL or the LGPL, and not to allow others to
          31                 :  * use your version of this file under the terms of the MPL, indicate your
          32                 :  * decision by deleting the provisions above and replace them with the notice
          33                 :  * and other provisions required by the GPL or the LGPL. If you do not delete
          34                 :  * the provisions above, a recipient may use your version of this file under
          35                 :  * the terms of any one of the MPL, the GPL or the LGPL.
          36                 :  *
          37                 :  * ***** END LICENSE BLOCK ***** */
          38                 :
          39                 : #ifndef jsalloc_h_
          40                 : #define jsalloc_h_
          41                 :
          42                 : #include "jspubtd.h"
          43                 : #include "jsutil.h"
          44                 :
          45                 : namespace js {
          46                 :
          47                 : /*
          48                 :  * Allocation policies.  These model the concept:
          49                 :  *  - public copy constructor, assignment, destructor
          50                 :  *  - void *malloc_(size_t)
          51                 :  *      Responsible for OOM reporting on NULL return value.
          52                 :  *  - void *realloc_(size_t)
          53                 :  *      Responsible for OOM reporting on NULL return value.
          54                 :  *      The *used* bytes of the previous buffer is passed in
          55                 :  *      (rather than the old allocation size), in addition to
          56                 :  *      the *new* allocation size requested.
          57                 :  *  - void free_(void *)
          58                 :  *  - reportAllocOverflow()
          59                 :  *      Called on overflow before the container returns NULL.
          60                 :  */
          61                 :
          62                 : /* Policy for using system memory functions and doing no error reporting. */
          63                 : class SystemAllocPolicy
          64                 : {
          65                 :   public:
          66         1172407 :     void *malloc_(size_t bytes) { return js_malloc(bytes); }
          67                 :     void *realloc_(void *p, size_t oldBytes, size_t bytes) { return js_realloc(p, bytes); }
          68         1172269 :     void free_(void *p) { js_free(p); }
          69               0 :     void reportAllocOverflow() const {}
          70                 : };
          71                 :
          72                 : /*
          73                 :  * Allocation policy that calls the system memory functions and reports errors
          74                 :  * to the context. Since the JSContext given on construction is stored for
          75                 :  * the lifetime of the container, this policy may only be used for containers
          76                 :  * whose lifetime is a shorter than the given JSContext.
          77                 :  *
          78                 :  * FIXME bug 647103 - rewrite this in terms of temporary allocation functions,
          79                 :  * not the system ones.
          80                 :  */
          81                 : class TempAllocPolicy
          82                 : {
          83                 :     JSContext *const cx;
          84                 :
          85                 :     /*
          86                 :      * Non-inline helper to call JSRuntime::onOutOfMemory with minimal
          87                 :      * code bloat.
          88                 :      */
          89                 :     JS_FRIEND_API(void *) onOutOfMemory(void *p, size_t nbytes);
          90                 :
          91                 :   public:
          92        10639774 :     TempAllocPolicy(JSContext *cx) : cx(cx) {}
          93                 :
          94                 :     JSContext *context() const {
          95                 :         return cx;
          96                 :     }
          97                 :
          98         2635256 :     void *malloc_(size_t bytes) {
          99         2635256 :         void *p = js_malloc(bytes);
         100         2635256 :         if (JS_UNLIKELY(!p))
         101               0 :             p = onOutOfMemory(NULL, bytes);
         102         2635256 :         return p;
         103                 :     }
         104                 :
         105                 :     void *realloc_(void *p, size_t oldBytes, size_t bytes) {
         106                 :         void *p2 = js_realloc(p, bytes);
         107                 :         if (JS_UNLIKELY(!p2))
         108                 :             p2 = onOutOfMemory(p2, bytes);
         109                 :         return p2;
         110                 :     }
         111                 :
         112         2633417 :     void free_(void *p) {
         113         2633417 :         js_free(p);
         114         2633417 :     }
         115                 :
         116                 :     JS_FRIEND_API(void) reportAllocOverflow() const;
         117                 : };
         118                 :
         119                 : } /* namespace js */
         120                 :
         121                 : #endif /* jsalloc_h_ */

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