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2c84ef6b8a
The immediate goal for this is to allow determinism in an arena used for an upcoming test, by essentially disabling purge on that specific arena. We do that by allowing arenas to be created with a specific setting for mMaxDirty. Incidentally, this allows to cleanup the mMaxDirty initialization for thread-local arenas. Longer term, this would allow to tweak arenas with more parameters, on a per arena basis. --HG-- extra : rebase_source : e4b844185d132aca9ee10224fc626f8293be0a34
85 lines
2.6 KiB
C++
85 lines
2.6 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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#ifndef mozjemalloc_h
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#define mozjemalloc_h
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#include "mozjemalloc_types.h"
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#include "mozilla/MacroArgs.h"
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// Macro helpers
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#define MACRO_CALL(a, b) a b
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// Can't use macros recursively, so we need another one doing the same as above.
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#define MACRO_CALL2(a, b) a b
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#define ARGS_HELPER(name, ...) \
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MACRO_CALL2(MOZ_PASTE_PREFIX_AND_ARG_COUNT(name, ##__VA_ARGS__), \
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(__VA_ARGS__))
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#define TYPED_ARGS0()
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#define TYPED_ARGS1(t1) t1 arg1
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#define TYPED_ARGS2(t1, t2) TYPED_ARGS1(t1), t2 arg2
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#define TYPED_ARGS3(t1, t2, t3) TYPED_ARGS2(t1, t2), t3 arg3
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#define ARGS0()
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#define ARGS1(t1) arg1
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#define ARGS2(t1, t2) ARGS1(t1), arg2
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#define ARGS3(t1, t2, t3) ARGS2(t1, t2), arg3
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#ifdef MOZ_MEMORY
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// Generic interface exposing the whole public allocator API
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// This facilitates the implementation of things like replace-malloc.
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// Note: compilers are expected to be able to optimize out `this`.
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template<typename T>
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struct Allocator : public T
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{
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#define MALLOC_DECL(name, return_type, ...) \
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static return_type name(__VA_ARGS__);
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#include "malloc_decls.h"
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};
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// The MozJemalloc allocator
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struct MozJemallocBase
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{
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};
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typedef Allocator<MozJemallocBase> MozJemalloc;
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#ifdef MOZ_REPLACE_MALLOC
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// The replace-malloc allocator
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struct ReplaceMallocBase
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{
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};
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typedef Allocator<ReplaceMallocBase> ReplaceMalloc;
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typedef ReplaceMalloc DefaultMalloc;
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#else
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typedef MozJemalloc DefaultMalloc;
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#endif
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#endif // MOZ_MEMORY
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// Dummy implementation of the moz_arena_* API, falling back to a given
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// implementation of the base allocator.
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template<typename T>
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struct DummyArenaAllocator
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{
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static arena_id_t moz_create_arena_with_params(arena_params_t*) { return 0; }
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static void moz_dispose_arena(arena_id_t) {}
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#define MALLOC_DECL(name, return_type, ...) \
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static return_type moz_arena_##name(arena_id_t, \
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ARGS_HELPER(TYPED_ARGS, ##__VA_ARGS__)) \
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{ \
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return T::name(ARGS_HELPER(ARGS, ##__VA_ARGS__)); \
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}
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#define MALLOC_FUNCS MALLOC_FUNCS_MALLOC_BASE
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#include "malloc_decls.h"
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};
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#endif
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