mirror of
https://github.com/mozilla/gecko-dev.git
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148 lines
3.3 KiB
C++
148 lines
3.3 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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* vim: set ts=8 sts=4 et sw=4 tw=99:
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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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/*
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* JavaScript Debugging support - Atom support
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*/
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#include "jsd.h"
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/* #define TEST_ATOMS 1 */
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#ifdef TEST_ATOMS
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static void
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_testAtoms(JSDContext*jsdc)
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{
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JSDAtom* atom0 = jsd_AddAtom(jsdc, "foo");
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JSDAtom* atom1 = jsd_AddAtom(jsdc, "foo");
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JSDAtom* atom2 = jsd_AddAtom(jsdc, "bar");
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JSDAtom* atom3 = jsd_CloneAtom(jsdc, atom1);
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JSDAtom* atom4 = jsd_CloneAtom(jsdc, atom2);
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const char* c0 = JSD_ATOM_TO_STRING(atom0);
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const char* c1 = JSD_ATOM_TO_STRING(atom1);
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const char* c2 = JSD_ATOM_TO_STRING(atom2);
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const char* c3 = JSD_ATOM_TO_STRING(atom3);
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const char* c4 = JSD_ATOM_TO_STRING(atom4);
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jsd_DropAtom(jsdc, atom0);
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jsd_DropAtom(jsdc, atom1);
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jsd_DropAtom(jsdc, atom2);
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jsd_DropAtom(jsdc, atom3);
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jsd_DropAtom(jsdc, atom4);
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}
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#endif
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static int
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_atom_smasher(JSHashEntry *he, int i, void *arg)
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{
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JS_ASSERT(he);
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JS_ASSERT(he->value);
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JS_ASSERT(((JSDAtom*)(he->value))->str);
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free(((JSDAtom*)(he->value))->str);
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free(he->value);
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he->value = nullptr;
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he->key = nullptr;
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return HT_ENUMERATE_NEXT;
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}
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static int
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_compareAtomKeys(const void *v1, const void *v2)
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{
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return 0 == strcmp((const char*)v1, (const char*)v2);
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}
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static int
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_compareAtoms(const void *v1, const void *v2)
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{
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return 0 == strcmp(((JSDAtom*)v1)->str, ((JSDAtom*)v2)->str);
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}
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bool
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jsd_CreateAtomTable(JSDContext* jsdc)
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{
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jsdc->atoms = JS_NewHashTable(256, JS_HashString,
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_compareAtomKeys, _compareAtoms,
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nullptr, nullptr);
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#ifdef TEST_ATOMS
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_testAtoms(jsdc);
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#endif
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return !!jsdc->atoms;
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}
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void
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jsd_DestroyAtomTable(JSDContext* jsdc)
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{
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if( jsdc->atoms )
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{
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JS_HashTableEnumerateEntries(jsdc->atoms, _atom_smasher, nullptr);
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JS_HashTableDestroy(jsdc->atoms);
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jsdc->atoms = nullptr;
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}
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}
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JSDAtom*
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jsd_AddAtom(JSDContext* jsdc, const char* str)
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{
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JSDAtom* atom;
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if(!str)
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{
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JS_ASSERT(0);
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return nullptr;
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}
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JSD_LOCK_ATOMS(jsdc);
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atom = (JSDAtom*) JS_HashTableLookup(jsdc->atoms, str);
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if( atom )
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atom->refcount++;
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else
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{
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atom = (JSDAtom*) malloc(sizeof(JSDAtom));
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if( atom )
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{
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atom->str = strdup(str);
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atom->refcount = 1;
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if(!JS_HashTableAdd(jsdc->atoms, atom->str, atom))
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{
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free(atom->str);
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free(atom);
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atom = nullptr;
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}
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}
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}
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JSD_UNLOCK_ATOMS(jsdc);
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return atom;
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}
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JSDAtom*
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jsd_CloneAtom(JSDContext* jsdc, JSDAtom* atom)
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{
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JSD_LOCK_ATOMS(jsdc);
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atom->refcount++;
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JSD_UNLOCK_ATOMS(jsdc);
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return atom;
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}
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void
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jsd_DropAtom(JSDContext* jsdc, JSDAtom* atom)
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{
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JSD_LOCK_ATOMS(jsdc);
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if(! --atom->refcount)
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{
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JS_HashTableRemove(jsdc->atoms, atom->str);
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free(atom->str);
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free(atom);
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}
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JSD_UNLOCK_ATOMS(jsdc);
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}
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