* Simultaneous open of same file under JNI
@ 1999-08-10 7:52 John Fralinger
1999-08-31 23:49 ` John Fralinger
0 siblings, 1 reply; 2+ messages in thread
From: John Fralinger @ 1999-08-10 7:52 UTC (permalink / raw)
To: cygwin
The following code demonstrates where System V shared memory
is breaking.
It uses Mumit Khan's JNI example environment.
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <fcntl.h>
#include <jni.h>
#include "HelloWorld.h"
JNIEXPORT void JNICALL
Java_HelloWorld_displayHelloWorld (JNIEnv *env, jobject obj)
{
char *home;
int fd;
char resp[256];
printf("Java JNI\n");
home = getenv ("HOME");
printf("HOME = %s\n", (home) ? home : "(NULL)");
printf("Enter any existing file name (complete path) to open\n");
gets( resp );
if ( ( fd = open( resp, O_RDWR ) ) == -1 )
perror( "open failed" );
printf("Run again from another window BEFORE Enter to exit\n");
printf("(Use the same file name to demonstrate problem)\n");
gets( resp );
return;
}
Shouldn't this work the same way when called from JNI????
When I run 2 of these to the same file I get Permission denied!
John H. Fralinger |
SW Contract Engineer | 1-610-255-5607
Research & Development |
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^ permalink raw reply [flat|nested] 2+ messages in thread
* Simultaneous open of same file under JNI
1999-08-10 7:52 Simultaneous open of same file under JNI John Fralinger
@ 1999-08-31 23:49 ` John Fralinger
0 siblings, 0 replies; 2+ messages in thread
From: John Fralinger @ 1999-08-31 23:49 UTC (permalink / raw)
To: cygwin
The following code demonstrates where System V shared memory
is breaking.
It uses Mumit Khan's JNI example environment.
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <fcntl.h>
#include <jni.h>
#include "HelloWorld.h"
JNIEXPORT void JNICALL
Java_HelloWorld_displayHelloWorld (JNIEnv *env, jobject obj)
{
char *home;
int fd;
char resp[256];
printf("Java JNI\n");
home = getenv ("HOME");
printf("HOME = %s\n", (home) ? home : "(NULL)");
printf("Enter any existing file name (complete path) to open\n");
gets( resp );
if ( ( fd = open( resp, O_RDWR ) ) == -1 )
perror( "open failed" );
printf("Run again from another window BEFORE Enter to exit\n");
printf("(Use the same file name to demonstrate problem)\n");
gets( resp );
return;
}
Shouldn't this work the same way when called from JNI????
When I run 2 of these to the same file I get Permission denied!
John H. Fralinger |
SW Contract Engineer | 1-610-255-5607
Research & Development |
--
Want to unsubscribe from this list?
Send a message to cygwin-unsubscribe@sourceware.cygnus.com
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