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NSLock+GNUstepBase documentation

Authors

Richard Frith-Macdonald (rfm@gnu.org)

Date: Generated at 2025-02-13 06:02:40 +0000

Copyright: (C) 2003-2010 Free Software Foundation, Inc.

Contents -

  1. Software documentation for the NSLock(GNUstepBase) category
  2. Software documentation for the NSRecursiveLock(GNUstepBase) category

Software documentation for the NSLock(GNUstepBase) category

NSLock(GNUstepBase)

Declared in:
GNUstepBase/NSLock+GNUstepBase.h
Availability: Not in OpenStep/MacOS-X

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(GNUstepBase) +newLockAt:] for details. This macro is intended for code that cannot insure that a lock can be initialized in thread safe manner otherwise. 
 NSLock *my_lock = nil;

 void function (void)
 {
   [GS_INITIALIZED_LOCK(my_lock, NSLock) lock];
   do_work ();
   [my_lock unlock];
 }
Method summary

newLockAt: 

+ (id) newLockAt: (id*)location;
Availability: Not in OpenStep/MacOS-X

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.
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. 
 NSLock *my_lock = nil;

 void function (void)
 {
   [GS_INITIALIZED_LOCK(my_lock, NSLock) lock];
   do_work ();
   [my_lock unlock];
 }

Software documentation for the NSRecursiveLock(GNUstepBase) category

NSRecursiveLock(GNUstepBase)

Declared in:
GNUstepBase/NSLock+GNUstepBase.h
Availability: Not in OpenStep/MacOS-X

Description forthcoming.
Method summary

newLockAt: 

+ (id) newLockAt: (id*)location;
Availability: Not in OpenStep/MacOS-X

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.
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. 
 NSLock *my_lock = nil;

 void function (void)
 {
   [GS_INITIALIZED_LOCK(my_lock, NSLock) lock];
   do_work ();
   [my_lock unlock];
 }

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