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git-svn-id: svn+ssh://svn.gna.org/svn/gnustep/libs/base/trunk@9555 72102866-910b-0410-8b05-ffd578937521
51 lines
1.9 KiB
XML
51 lines
1.9 KiB
XML
<?xml version="1.0"?>
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<!DOCTYPE gsdoc PUBLIC "-//GNUstep//DTD gsdoc 0.6.6//EN" "http://www.gnustep.org/gsdoc-0_6_6.xml">
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<gsdoc base="NSLock" prev="NSInvocation" next="NSMethodSignature" up="Base">
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<head>
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<title>NSLock</title>
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<author name="Adam Fedor">
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<email address="fedor@gnu.org"/>
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<url url="http://www.gnustep.org/developers/whoiswho.html"/>
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</author>
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<version>$Revision$</version>
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<date>$Date$</date>
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</head>
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<body>
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<chapter>
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<heading>NSLock</heading>
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<class name="NSLock" super="NSObject">
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<declared>Foundation/NSLock.h</declared>
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<conform>NSLocking</conform>
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<desc>
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An NSLock is used in multi-threaded applications to protect critical
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pieces of code. While one thread holds a lock within a piece of code,
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another thread cannot execute that code until the first thread has
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given up it's hold on the lock. The limitation of NSLock is that
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you can only lock an
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NSLock once and it must be unlocked before it can be aquired again.
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Other lock classes, notably NSRecursiveLock, have
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different restrictions.
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</desc>
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<method type="BOOL">
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<sel>lockBeforeDate:</sel>
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<arg type="NSDate*">limit</arg>
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<desc>
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Attempts to aquire a lock before the date limit passes. It returns YES
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if it can. It returns NO if it cannot, or if the current thread already
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has the lock (but it waits until the time limit is up before returning
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NO).
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</desc>
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</method>
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<method type="BOOL">
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<sel>tryLock</sel>
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<desc>
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Attempts to aquire a lock, but returns immediately if the lock
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cannot be aquired. It returns YES if the lock is aquired. It returns
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NO if the lock cannot be aquired or if the current thread already has
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the lock.
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</desc>
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</method>
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</class>
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</chapter>
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</body>
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</gsdoc>
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