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Updated distributed objects code to cope with triangular relationships -

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Process A vends object to B which vends object to C.
There was a problem where B could give the object to C and release it in A
before C could get a proxy to the original in A.  Now we give it 30 seconds
to establish the connection.


git-svn-id: svn+ssh://svn.gna.org/svn/gnustep/libs/base/trunk@2824 72102866-910b-0410-8b05-ffd578937521
This commit is contained in:
richard 1998-06-26 20:39:50 +00:00
parent f3a3fe0f57
commit fe8b8fa3d4
10 changed files with 2023 additions and 871 deletions
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44
Source/NSDistantObject.m
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@ -28,6 +28,17 @@
static int debug_proxy;
@interface NSDistantObject (Debug)
+ (void) setDebug: (int)val;
@end
@implementation NSDistantObject (Debug)
+ (void) setDebug: (int)val
{
debug_proxy = val;
}
@end
@implementation NSDistantObject
/* This is the proxy tag; it indicates where the local object is,
@ -127,8 +138,7 @@ format: @"NSDistantObject objects only encode with PortEncoder class"];
proxy_tag = PROXY_LOCAL_FOR_SENDER;
if (debug_proxy)
fprintf(stderr, "Sending a proxy, will be remote 0x%x "
"connection 0x%x\n",
NSLog(@"Sending a proxy, will be remote 0x%x connection 0x%x\n",
(unsigned)_object,
(unsigned)_connection);
@ -147,8 +157,7 @@ format: @"NSDistantObject objects only encode with PortEncoder class"];
proxy_tag = PROXY_LOCAL_FOR_RECEIVER;
if (debug_proxy)
fprintf(stderr, "Sending a proxy, will be local 0x%x "
"connection 0x%x\n",
NSLog(@"Sending a proxy, will be local 0x%x connection 0x%x\n",
(unsigned)_object,
(unsigned)_connection);
@ -174,8 +183,8 @@ format: @"NSDistantObject objects only encode with PortEncoder class"];
proxy_tag = PROXY_REMOTE_FOR_BOTH;
if (debug_proxy)
fprintf(stderr, "Sending triangle-connection proxy 0x%x "
"proxy-conn 0x%x to-conn 0x%x\n",
NSLog(@"Sending triangle-connection proxy 0x%x "
@"proxy-conn 0x%x to-conn 0x%x\n",
(unsigned)_object,
(unsigned)_connection, (unsigned)encoder_connection);
@ -193,6 +202,10 @@ format: @"NSDistantObject objects only encode with PortEncoder class"];
[aRmc encodeBycopyObject: proxy_connection_out_port
withName: @"Proxy outPort"];
/*
* Make a note that we have passed this on to another process.
*/
_isVended = YES;
}
}
@ -244,7 +257,7 @@ format: @"NSDistantObject objects only encode with PortEncoder class"];
[_connection addLocalObject: self];
if (debug_proxy)
printf("Created new local=0x%x object 0x%x connection 0x%x\n",
NSLog(@"Created new local=0x%x object 0x%x connection 0x%x\n",
(unsigned)self, (unsigned)_object, (unsigned)_connection);
return self;
@ -280,7 +293,7 @@ format: @"NSDistantObject objects only encode with PortEncoder class"];
[_connection addProxy: self];
if (debug_proxy)
printf("Created new proxy=0x%x object 0x%x connection 0x%x\n",
NSLog(@"Created new proxy=0x%x object 0x%x connection 0x%x\n",
(unsigned)self, (unsigned)_object, (unsigned)_connection);
return self;
@ -370,8 +383,8 @@ format: @"NSDistantObject objects only decode with PortDecoder class"];
withName: NULL];
if (debug_proxy)
fprintf(stderr, "Receiving a proxy for local object 0x%x "
"connection 0x%x\n", target, (unsigned)decoder_connection);
NSLog(@"Receiving a proxy for local object 0x%x "
@"connection 0x%x\n", target, (unsigned)decoder_connection);
if (![[decoder_connection class] includesLocalObject: (id)target])
[NSException raise: @"ProxyDecodedBadTarget"
@ -381,6 +394,9 @@ format: @"NSDistantObject objects only decode with PortDecoder class"];
id local = [NSDistantObject proxyWithLocal: (id)target
connection: decoder_connection];
if (debug_proxy)
NSLog(@"Local object is 0x%x (0x%x)\n",
(unsigned)local, (unsigned)[local targetForProxy]);
return [[local targetForProxy] retain];
}
@ -396,7 +412,7 @@ format: @"NSDistantObject objects only decode with PortDecoder class"];
at: &target
withName: NULL];
if (debug_proxy)
fprintf(stderr, "Receiving a proxy, was local 0x%x connection 0x%x\n",
NSLog(@"Receiving a proxy, was local 0x%x connection 0x%x\n",
(unsigned)target, (unsigned)decoder_connection);
return [[NSDistantObject proxyWithTarget: (id)target
connection: decoder_connection] retain];
@ -453,8 +469,8 @@ format: @"NSDistantObject objects only decode with PortDecoder class"];
ancestorConnection: decoder_connection];
if (debug_proxy)
fprintf(stderr, "Receiving a triangle-connection proxy 0x%x "
"connection 0x%x\n", target, (unsigned)proxy_connection);
NSLog(@"Receiving a triangle-connection proxy 0x%x "
@"connection 0x%x\n", target, (unsigned)proxy_connection);
assert (proxy_connection != decoder_connection);
assert ([proxy_connection isValid]);
@ -511,7 +527,7 @@ format: @"NSDistantObject objects only decode with PortDecoder class"];
- forward: (SEL)aSel :(arglist_t)frame
{
if (debug_proxy)
printf("NSDistantObject forwarding %s\n", sel_get_name(aSel));
NSLog(@"NSDistantObject forwarding %s\n", sel_get_name(aSel));
if (![_connection isValid])
[NSException