Chromium Code Reviews
chromiumcodereview-hr@appspot.gserviceaccount.com (chromiumcodereview-hr) | Please choose your nickname with Settings | Help | Chromium Project | Gerrit Changes | Sign out
(2164)

Unified Diff: base/mac/objc_property_releaser.mm

Issue 1647803004: Move base to DEPS (Closed) Base URL: git@github.com:domokit/mojo.git@master
Patch Set: Created 4 years, 11 months ago
Use n/p to move between diff chunks; N/P to move between comments. Draft comments are only viewable by you.
Jump to:
View side-by-side diff with in-line comments
Download patch
« no previous file with comments | « base/mac/objc_property_releaser.h ('k') | base/mac/objc_property_releaser_unittest.mm » ('j') | no next file with comments »
Expand Comments ('e') | Collapse Comments ('c') | Show Comments Hide Comments ('s')
Index: base/mac/objc_property_releaser.mm
diff --git a/base/mac/objc_property_releaser.mm b/base/mac/objc_property_releaser.mm
deleted file mode 100644
index f7ee88fbcc4dd0e4c8d7b7ce95d9030021042324..0000000000000000000000000000000000000000
--- a/base/mac/objc_property_releaser.mm
+++ /dev/null
@@ -1,131 +0,0 @@
-// Copyright (c) 2011 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#import "base/mac/objc_property_releaser.h"
-
-#import <objc/runtime.h>
-#include <stdlib.h>
-
-#include <string>
-
-#include "base/logging.h"
-
-namespace base {
-namespace mac {
-
-namespace {
-
-// Returns the name of the instance variable backing the property, if known,
-// if the property is marked "retain" or "copy". If the instance variable name
-// is not known (perhaps because it was not automatically associated with the
-// property by @synthesize) or if the property is not "retain" or "copy",
-// returns an empty string.
-std::string ReleasableInstanceName(objc_property_t property) {
- // TODO(mark): Starting in newer system releases, the Objective-C runtime
- // provides a function to break the property attribute string into
- // individual attributes (property_copyAttributeList), as well as a function
- // to look up the value of a specific attribute
- // (property_copyAttributeValue). When the SDK defining that interface is
- // final, this function should be adapted to walk the attribute list as
- // returned by property_copyAttributeList when that function is available in
- // preference to scanning through the attribute list manually.
-
- // The format of the string returned by property_getAttributes is documented
- // at
- // http://developer.apple.com/library/mac/#documentation/Cocoa/Conceptual/ObjCRuntimeGuide/Articles/ocrtPropertyIntrospection.html#//apple_ref/doc/uid/TP40008048-CH101-SW6
- const char* property_attributes = property_getAttributes(property);
-
- std::string instance_name;
- bool releasable = false;
- while (*property_attributes) {
- char name = *property_attributes;
-
- const char* value = ++property_attributes;
- while (*property_attributes && *property_attributes != ',') {
- ++property_attributes;
- }
-
- switch (name) {
- // It might seem intelligent to check the type ('T') attribute to verify
- // that it identifies an NSObject-derived type (the attribute value
- // begins with '@'.) This is a bad idea beacuse it fails to identify
- // CFTypeRef-based properties declared as __attribute__((NSObject)),
- // which just show up as pointers to their underlying CFType structs.
- //
- // Quoting
- // http://developer.apple.com/library/mac/#documentation/Cocoa/Conceptual/ObjectiveC/Chapters/ocProperties.html#//apple_ref/doc/uid/TP30001163-CH17-SW27
- //
- // > In Mac OS X v10.6 and later, you can use the __attribute__ keyword
- // > to specify that a Core Foundation property should be treated like
- // > an Objective-C object for memory management:
- // > @property(retain) __attribute__((NSObject)) CFDictionaryRef
- // > myDictionary;
- case 'C': // copy
- case '&': // retain
- releasable = true;
- break;
- case 'V': // instance variable name
- // 'V' is specified as the last attribute to occur in the
- // documentation, but empirically, it's not always the last. In
- // GC-supported or GC-required code, the 'P' (GC-eligible) attribute
- // occurs after 'V'.
- instance_name.assign(value, property_attributes - value);
- break;
- }
-
- if (*property_attributes) {
- ++property_attributes;
- }
- }
-
- if (releasable) {
- return instance_name;
- }
-
- return std::string();
-}
-
-} // namespace
-
-void ObjCPropertyReleaser::Init(id object, Class classy) {
- DCHECK(!object_);
- DCHECK(!class_);
- CHECK([object isKindOfClass:classy]);
-
- object_ = object;
- class_ = classy;
-}
-
-void ObjCPropertyReleaser::ReleaseProperties() {
- DCHECK(object_);
- DCHECK(class_);
-
- unsigned int property_count = 0;
- objc_property_t* properties = class_copyPropertyList(class_, &property_count);
-
- for (unsigned int property_index = 0;
- property_index < property_count;
- ++property_index) {
- objc_property_t property = properties[property_index];
- std::string instance_name = ReleasableInstanceName(property);
- if (!instance_name.empty()) {
- id instance_value = nil;
- Ivar instance_variable =
- object_getInstanceVariable(object_, instance_name.c_str(),
- (void**)&instance_value);
- DCHECK(instance_variable);
- [instance_value release];
- }
- }
-
- free(properties);
-
- // Clear object_ and class_ in case this ObjCPropertyReleaser will live on.
- // It's only expected to release the properties it supervises once per Init.
- object_ = nil;
- class_ = nil;
-}
-
-} // namespace mac
-} // namespace base
« no previous file with comments | « base/mac/objc_property_releaser.h ('k') | base/mac/objc_property_releaser_unittest.mm » ('j') | no next file with comments »

Powered by Google App Engine
This is Rietveld 408576698