js/src/vm/SharedArrayObject.h@129ffea94266 (annotated)
js/src/vm/SharedArrayObject.h
Sat, 03 Jan 2015 20:18:00 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Sat, 03 Jan 2015 20:18:00 +0100
- branch
- TOR_BUG_3246
- changeset 7
- 129ffea94266
- permissions
- -rw-r--r--
Conditionally enable double key logic according to:
private browsing mode or privacy.thirdparty.isolate preference and
implement in GetCookieStringCommon and FindCookie where it counts...
With some reservations of how to convince FindCookie users to test
condition and pass a nullptr when disabling double key logic.
| michael@0 | 1 | /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- |
| michael@0 | 2 | * vim: set ts=8 sts=4 et sw=4 tw=99: |
| michael@0 | 3 | * This Source Code Form is subject to the terms of the Mozilla Public |
| michael@0 | 4 | * License, v. 2.0. If a copy of the MPL was not distributed with this |
| michael@0 | 5 | * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ |
| michael@0 | 6 | |
| michael@0 | 7 | #ifndef vm_SharedArrayObject_h |
| michael@0 | 8 | #define vm_SharedArrayObject_h |
| michael@0 | 9 | |
| michael@0 | 10 | #include "mozilla/Atomics.h" |
| michael@0 | 11 | |
| michael@0 | 12 | #include "jsapi.h" |
| michael@0 | 13 | #include "jsobj.h" |
| michael@0 | 14 | #include "jstypes.h" |
| michael@0 | 15 | |
| michael@0 | 16 | #include "gc/Barrier.h" |
| michael@0 | 17 | #include "vm/ArrayBufferObject.h" |
| michael@0 | 18 | |
| michael@0 | 19 | typedef struct JSProperty JSProperty; |
| michael@0 | 20 | |
| michael@0 | 21 | namespace js { |
| michael@0 | 22 | |
| michael@0 | 23 | /* |
| michael@0 | 24 | * SharedArrayRawBuffer |
| michael@0 | 25 | * |
| michael@0 | 26 | * A bookkeeping object always stored immediately before the raw buffer. |
| michael@0 | 27 | * The buffer itself is mmap()'d and refcounted. |
| michael@0 | 28 | * SharedArrayBufferObjects and AsmJS code may hold references. |
| michael@0 | 29 | * |
| michael@0 | 30 | * |<------ sizeof ------>|<- length ->| |
| michael@0 | 31 | * |
| michael@0 | 32 | * | waste | SharedArrayRawBuffer | data array | waste | |
| michael@0 | 33 | */ |
| michael@0 | 34 | class SharedArrayRawBuffer |
| michael@0 | 35 | { |
| michael@0 | 36 | private: |
| michael@0 | 37 | mozilla::Atomic<uint32_t, mozilla::ReleaseAcquire> refcount; |
| michael@0 | 38 | uint32_t length; |
| michael@0 | 39 | |
| michael@0 | 40 | protected: |
| michael@0 | 41 | SharedArrayRawBuffer(uint8_t *buffer, uint32_t length) |
| michael@0 | 42 | : refcount(1), length(length) |
| michael@0 | 43 | { |
| michael@0 | 44 | JS_ASSERT(buffer == dataPointer()); |
| michael@0 | 45 | } |
| michael@0 | 46 | |
| michael@0 | 47 | public: |
| michael@0 | 48 | static SharedArrayRawBuffer *New(uint32_t length); |
| michael@0 | 49 | |
| michael@0 | 50 | inline uint8_t *dataPointer() const { |
| michael@0 | 51 | return ((uint8_t *)this) + sizeof(SharedArrayRawBuffer); |
| michael@0 | 52 | } |
| michael@0 | 53 | |
| michael@0 | 54 | inline uint32_t byteLength() const { |
| michael@0 | 55 | return length; |
| michael@0 | 56 | } |
| michael@0 | 57 | |
| michael@0 | 58 | void addReference(); |
| michael@0 | 59 | void dropReference(); |
| michael@0 | 60 | }; |
| michael@0 | 61 | |
| michael@0 | 62 | /* |
| michael@0 | 63 | * SharedArrayBufferObject |
| michael@0 | 64 | * |
| michael@0 | 65 | * When transferred to a WebWorker, the buffer is not neutered on the parent side, |
| michael@0 | 66 | * and both child and parent reference the same buffer. |
| michael@0 | 67 | */ |
| michael@0 | 68 | class SharedArrayBufferObject : public ArrayBufferObject |
| michael@0 | 69 | { |
| michael@0 | 70 | static bool byteLengthGetterImpl(JSContext *cx, CallArgs args); |
| michael@0 | 71 | |
| michael@0 | 72 | public: |
| michael@0 | 73 | static const Class class_; |
| michael@0 | 74 | static const Class protoClass; |
| michael@0 | 75 | |
| michael@0 | 76 | // Slot used for storing a pointer to the SharedArrayRawBuffer. |
| michael@0 | 77 | static const uint8_t RAWBUF_SLOT = ArrayBufferObject::RESERVED_SLOTS; |
| michael@0 | 78 | |
| michael@0 | 79 | static const uint8_t RESERVED_SLOTS = ArrayBufferObject::RESERVED_SLOTS + 1; |
| michael@0 | 80 | |
| michael@0 | 81 | static bool class_constructor(JSContext *cx, unsigned argc, Value *vp); |
| michael@0 | 82 | |
| michael@0 | 83 | // Create a SharedArrayBufferObject with a new SharedArrayRawBuffer. |
| michael@0 | 84 | static JSObject *New(JSContext *cx, uint32_t length); |
| michael@0 | 85 | |
| michael@0 | 86 | // Create a SharedArrayBufferObject using an existing SharedArrayRawBuffer. |
| michael@0 | 87 | static JSObject *New(JSContext *cx, SharedArrayRawBuffer *buffer); |
| michael@0 | 88 | |
| michael@0 | 89 | static bool byteLengthGetter(JSContext *cx, unsigned argc, Value *vp); |
| michael@0 | 90 | |
| michael@0 | 91 | static void Finalize(FreeOp *fop, JSObject *obj); |
| michael@0 | 92 | |
| michael@0 | 93 | void acceptRawBuffer(SharedArrayRawBuffer *buffer); |
| michael@0 | 94 | void dropRawBuffer(); |
| michael@0 | 95 | |
| michael@0 | 96 | SharedArrayRawBuffer *rawBufferObject() const; |
| michael@0 | 97 | uint8_t *dataPointer() const; |
| michael@0 | 98 | uint32_t byteLength() const; |
| michael@0 | 99 | }; |
| michael@0 | 100 | |
| michael@0 | 101 | bool |
| michael@0 | 102 | IsSharedArrayBuffer(HandleValue v); |
| michael@0 | 103 | |
| michael@0 | 104 | } // namespace js |
| michael@0 | 105 | |
| michael@0 | 106 | #endif // vm_SharedArrayObject_h |
