/usr/include/GNUstep/GNUstepBase/NSLock+GNUstepBase.h is in libgnustep-base-dev 1.24.0-1ubuntu3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 | /** Declaration of extension methods for base additions
Copyright (C) 2003-2010 Free Software Foundation, Inc.
Written by: Richard Frith-Macdonald <rfm@gnu.org>
and: Adam Fedor <fedor@gnu.org>
This file is part of the GNUstep Base Library.
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free
Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02111 USA.
*/
#ifndef INCLUDED_NSLock_GNUstepBase_h
#define INCLUDED_NSLock_GNUstepBase_h
#import <GNUstepBase/GSVersionMacros.h>
#import <Foundation/NSLock.h>
#if defined(__cplusplus)
extern "C" {
#endif
#if OS_API_VERSION(GS_API_NONE,GS_API_LATEST)
/**
* Returns IDENT which will be initialized
* to an instance of a CLASSNAME in a thread safe manner.
* If IDENT has been previously initialized
* this macro merely returns IDENT.
* IDENT is considered uninitialized, if it contains nil.
* CLASSNAME must be either NSLock, NSRecursiveLock or one
* of their subclasses.
* See [NSLock+newLockAt:] for details.
* This macro is intended for code that cannot insure
* that a lock can be initialized in thread safe manner otherwise.
* <example>
* NSLock *my_lock = nil;
*
* void function (void)
* {
* [GS_INITIALIZED_LOCK(my_lock, NSLock) lock];
* do_work ();
* [my_lock unlock];
* }
*
* </example>
*/
#define GS_INITIALIZED_LOCK(IDENT,CLASSNAME) \
(IDENT != nil ? (id)IDENT : (id)[CLASSNAME newLockAt: &IDENT])
@interface NSLock (GNUstepBase)
/**
* Initializes the id pointed to by location
* with a new instance of the receiver's class
* in a thread safe manner, unless
* it has been previously initialized.
* Returns the contents pointed to by location.
* The location is considered unintialized if it contains nil.
* <br/>
* This method is used in the GS_INITIALIZED_LOCK macro
* to initialize lock variables when it cannot be insured
* that they can be initialized in a thread safe environment.
* <example>
* NSLock *my_lock = nil;
*
* void function (void)
* {
* [GS_INITIALIZED_LOCK(my_lock, NSLock) lock];
* do_work ();
* [my_lock unlock];
* }
*
* </example>
*/
+ (id) newLockAt: (id *)location;
@end
@interface NSRecursiveLock (GNUstepBase)
/**
* Initializes the id pointed to by location
* with a new instance of the receiver's class
* in a thread safe manner, unless
* it has been previously initialized.
* Returns the contents pointed to by location.
* The location is considered unintialized if it contains nil.
* <br/>
* This method is used in the GS_INITIALIZED_LOCK macro
* to initialize lock variables when it cannot be insured
* that they can be initialized in a thread safe environment.
* <example>
* NSLock *my_lock = nil;
*
* void function (void)
* {
* [GS_INITIALIZED_LOCK(my_lock, NSLock) lock];
* do_work ();
* [my_lock unlock];
* }
*
* </example>
*/
+ (id) newLockAt: (id *)location;
@end
#endif /* OS_API_VERSION */
#if defined(__cplusplus)
}
#endif
#endif /* INCLUDED_NSLock_GNUstepBase_h */
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