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NSDistributedLock from Frith-MacDonald

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git-svn-id: svn+ssh://svn.gna.org/svn/gnustep/libs/base/trunk@2613 72102866-910b-0410-8b05-ffd578937521
This commit is contained in:
fedor 1997-11-03 01:40:03 +00:00
parent 1e85219e08
commit 2b1d0b3d15
7 changed files with 132 additions and 11 deletions
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22
Source/NSUserDefaults.m
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@ -47,6 +47,7 @@
#include <Foundation/NSNotification.h>
#include <Foundation/NSTimer.h>
#include <Foundation/NSProcessInfo.h>
#include <Foundation/NSDistributedLock.h>
/* Wait for access */
#define _MAX_COUNT 5 /* Max 10 sec. */
@ -70,7 +71,8 @@ static NSString* GNU_UserDefaultsDatabaseLock = @"GNUstep/.GNUstepUDLock";
*************************************************************************/
static NSUserDefaults *sharedDefaults = nil;
static NSMutableString *defaultsDatabase = nil;
static NSMutableString *defaultsDatabaseLock = nil;
static NSMutableString *defaultsDatabaseLockName = nil;
static NSDistributedLock *defaultsDatabaseLock = nil;
static NSMutableString *processName = nil;
/*************************************************************************
@ -182,10 +184,12 @@ static NSMutableString *processName = nil;
[[NSMutableString stringWithFormat:@"%@/%@",
NSHomeDirectoryForUser(NSUserName()),
GNU_UserDefaultsDatabase] retain];
defaultsDatabaseLock =
defaultsDatabaseLockName =
[[NSMutableString stringWithFormat:@"%@/%@",
NSHomeDirectoryForUser(NSUserName()),
GNU_UserDefaultsDatabaseLock] retain];
defaultsDatabaseLock =
[[NSDistributedLock lockWithPath: defaultsDatabaseLockName] retain];
processName = [[[NSProcessInfo processInfo] processName] retain];
#if 0
processName = [[NSMutableString stringWithFormat:@"TestApp"] retain];
@ -199,7 +203,6 @@ static NSMutableString *processName = nil;
persDomains = [[NSMutableDictionary dictionaryWithCapacity:10] retain];
if ([self synchronize] == NO)
{
NSLog(@"unable to load defaults - %s", strerror(errno));
[self dealloc];
return self = nil;
}
@ -465,8 +468,12 @@ static NSMutableString *processName = nil;
tickingTimer = NO;
// Get file lock
if (mkdir([defaultsDatabaseLock cString],0755) == -1)
return NO;
if ([defaultsDatabaseLock tryLock] == NO)
{
NSLog(@"unable to access defaults database - locked on (%@) since %@\n",
defaultsDatabaseLockName, [defaultsDatabaseLock lockDate]);
return NO;
}
// Read the persistent data from the stored database
newDict = [[NSMutableDictionary allocWithZone:[self zone]]
@ -493,7 +500,8 @@ static NSMutableString *processName = nil;
// Save the changes
if (![persDomains writeToFile:defaultsDatabase atomically:YES])
{
rmdir([defaultsDatabaseLock cString]); // release file lock
NSLog(@"failed to write defaults to '%@'\n", defaultsDatabase);
[defaultsDatabaseLock unlock];
return NO;
}
}
@ -503,7 +511,7 @@ static NSMutableString *processName = nil;
persDomains = newDict;
}
rmdir([defaultsDatabaseLock cString]); // release file lock
[defaultsDatabaseLock unlock]; // release file lock
return YES;
}