The Tor Browser / file comparison
comparison: js/jsd/jsd_atom.cpp
js/jsd/jsd_atom.cpp
- changeset 0
- 6474c204b198
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| -1:000000000000 | 0:2af3207d95f6 |
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| 1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- | |
| 2 * vim: set ts=8 sts=4 et sw=4 tw=99: | |
| 3 * This Source Code Form is subject to the terms of the Mozilla Public | |
| 4 * License, v. 2.0. If a copy of the MPL was not distributed with this | |
| 5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 6 | |
| 7 /* | |
| 8 * JavaScript Debugging support - Atom support | |
| 9 */ | |
| 10 | |
| 11 #include "jsd.h" | |
| 12 | |
| 13 /* #define TEST_ATOMS 1 */ | |
| 14 | |
| 15 #ifdef TEST_ATOMS | |
| 16 static void | |
| 17 _testAtoms(JSDContext*jsdc) | |
| 18 { | |
| 19 JSDAtom* atom0 = jsd_AddAtom(jsdc, "foo"); | |
| 20 JSDAtom* atom1 = jsd_AddAtom(jsdc, "foo"); | |
| 21 JSDAtom* atom2 = jsd_AddAtom(jsdc, "bar"); | |
| 22 JSDAtom* atom3 = jsd_CloneAtom(jsdc, atom1); | |
| 23 JSDAtom* atom4 = jsd_CloneAtom(jsdc, atom2); | |
| 24 | |
| 25 const char* c0 = JSD_ATOM_TO_STRING(atom0); | |
| 26 const char* c1 = JSD_ATOM_TO_STRING(atom1); | |
| 27 const char* c2 = JSD_ATOM_TO_STRING(atom2); | |
| 28 const char* c3 = JSD_ATOM_TO_STRING(atom3); | |
| 29 const char* c4 = JSD_ATOM_TO_STRING(atom4); | |
| 30 | |
| 31 jsd_DropAtom(jsdc, atom0); | |
| 32 jsd_DropAtom(jsdc, atom1); | |
| 33 jsd_DropAtom(jsdc, atom2); | |
| 34 jsd_DropAtom(jsdc, atom3); | |
| 35 jsd_DropAtom(jsdc, atom4); | |
| 36 } | |
| 37 #endif | |
| 38 | |
| 39 static int | |
| 40 _atom_smasher(JSHashEntry *he, int i, void *arg) | |
| 41 { | |
| 42 MOZ_ASSERT(he); | |
| 43 MOZ_ASSERT(he->value); | |
| 44 MOZ_ASSERT(((JSDAtom*)(he->value))->str); | |
| 45 | |
| 46 free(((JSDAtom*)(he->value))->str); | |
| 47 free(he->value); | |
| 48 he->value = nullptr; | |
| 49 he->key = nullptr; | |
| 50 return HT_ENUMERATE_NEXT; | |
| 51 } | |
| 52 | |
| 53 static int | |
| 54 _compareAtomKeys(const void *v1, const void *v2) | |
| 55 { | |
| 56 return 0 == strcmp((const char*)v1, (const char*)v2); | |
| 57 } | |
| 58 | |
| 59 static int | |
| 60 _compareAtoms(const void *v1, const void *v2) | |
| 61 { | |
| 62 return 0 == strcmp(((JSDAtom*)v1)->str, ((JSDAtom*)v2)->str); | |
| 63 } | |
| 64 | |
| 65 | |
| 66 bool | |
| 67 jsd_CreateAtomTable(JSDContext* jsdc) | |
| 68 { | |
| 69 jsdc->atoms = JS_NewHashTable(256, JS_HashString, | |
| 70 _compareAtomKeys, _compareAtoms, | |
| 71 nullptr, nullptr); | |
| 72 #ifdef TEST_ATOMS | |
| 73 _testAtoms(jsdc); | |
| 74 #endif | |
| 75 return !!jsdc->atoms; | |
| 76 } | |
| 77 | |
| 78 void | |
| 79 jsd_DestroyAtomTable(JSDContext* jsdc) | |
| 80 { | |
| 81 if( jsdc->atoms ) | |
| 82 { | |
| 83 JS_HashTableEnumerateEntries(jsdc->atoms, _atom_smasher, nullptr); | |
| 84 JS_HashTableDestroy(jsdc->atoms); | |
| 85 jsdc->atoms = nullptr; | |
| 86 } | |
| 87 } | |
| 88 | |
| 89 JSDAtom* | |
| 90 jsd_AddAtom(JSDContext* jsdc, const char* str) | |
| 91 { | |
| 92 JSDAtom* atom; | |
| 93 | |
| 94 if(!str) | |
| 95 { | |
| 96 MOZ_ASSERT(0); | |
| 97 return nullptr; | |
| 98 } | |
| 99 | |
| 100 JSD_LOCK_ATOMS(jsdc); | |
| 101 | |
| 102 atom = (JSDAtom*) JS_HashTableLookup(jsdc->atoms, str); | |
| 103 | |
| 104 if( atom ) | |
| 105 atom->refcount++; | |
| 106 else | |
| 107 { | |
| 108 atom = (JSDAtom*) malloc(sizeof(JSDAtom)); | |
| 109 if( atom ) | |
| 110 { | |
| 111 atom->str = strdup(str); | |
| 112 atom->refcount = 1; | |
| 113 if(!JS_HashTableAdd(jsdc->atoms, atom->str, atom)) | |
| 114 { | |
| 115 free(atom->str); | |
| 116 free(atom); | |
| 117 atom = nullptr; | |
| 118 } | |
| 119 } | |
| 120 } | |
| 121 | |
| 122 JSD_UNLOCK_ATOMS(jsdc); | |
| 123 return atom; | |
| 124 } | |
| 125 | |
| 126 JSDAtom* | |
| 127 jsd_CloneAtom(JSDContext* jsdc, JSDAtom* atom) | |
| 128 { | |
| 129 JSD_LOCK_ATOMS(jsdc); | |
| 130 atom->refcount++; | |
| 131 JSD_UNLOCK_ATOMS(jsdc); | |
| 132 return atom; | |
| 133 } | |
| 134 | |
| 135 void | |
| 136 jsd_DropAtom(JSDContext* jsdc, JSDAtom* atom) | |
| 137 { | |
| 138 JSD_LOCK_ATOMS(jsdc); | |
| 139 if(! --atom->refcount) | |
| 140 { | |
| 141 JS_HashTableRemove(jsdc->atoms, atom->str); | |
| 142 free(atom->str); | |
| 143 free(atom); | |
| 144 } | |
| 145 JSD_UNLOCK_ATOMS(jsdc); | |
| 146 } | |
| 147 |
