Difference between revisions of "User:Kr/exit race.c"
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< User:Kr
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A race between threads and the "exit" call ... | A race between threads and the "exit" call ... | ||
| − | + | Solaris: | |
| − | + | <source lang="bash"> | |
> cc exit_race.c -o exit_race.bin | > cc exit_race.c -o exit_race.bin | ||
> ./exit_race.bin | > ./exit_race.bin | ||
| Line 17: | Line 17: | ||
bar - tid: b7ddab90 | bar - tid: b7ddab90 | ||
main - ad: 1 | main - ad: 1 | ||
| − | + | </source> | |
| − | + | <source lang="c"> | |
#include <pthread.h> | #include <pthread.h> | ||
#include <stdio.h> | #include <stdio.h> | ||
| Line 29: | Line 29: | ||
# define PFUN __func__ | # define PFUN __func__ | ||
#endif | #endif | ||
| − | |||
static void * foo(void * gr) { | static void * foo(void * gr) { | ||
fprintf(stderr, "%s - tid: %x\n", PFUN, pthread_self()); | fprintf(stderr, "%s - tid: %x\n", PFUN, pthread_self()); | ||
| − | |||
sleep(5); | sleep(5); | ||
| − | |||
exit(0); | exit(0); | ||
} | } | ||
| Line 47: | Line 44: | ||
static void bar(void) { | static void bar(void) { | ||
fprintf(stderr, "%s - tid: %x\n", PFUN, pthread_self()); | fprintf(stderr, "%s - tid: %x\n", PFUN, pthread_self()); | ||
| − | |||
ad = 1; | ad = 1; | ||
| − | |||
sleep(5); // this just stands for some slow de-initialization | sleep(5); // this just stands for some slow de-initialization | ||
} | } | ||
| Line 56: | Line 51: | ||
# pragma fini(bar) | # pragma fini(bar) | ||
#endif | #endif | ||
| − | |||
| − | |||
static pthread_t bt; | static pthread_t bt; | ||
| Line 67: | Line 60: | ||
int main() { | int main() { | ||
fprintf(stderr, "%s - tid: %x\n", PFUN, pthread_self()); | fprintf(stderr, "%s - tid: %x\n", PFUN, pthread_self()); | ||
| − | |||
pthread_create(&bt, NULL, foo, NULL); | pthread_create(&bt, NULL, foo, NULL); | ||
| − | |||
while (!ad) ; // Busy wait for ad to change! | while (!ad) ; // Busy wait for ad to change! | ||
| − | |||
fprintf(stderr, "%s - ad: %i\n", PFUN, ad); | fprintf(stderr, "%s - ad: %i\n", PFUN, ad); | ||
| − | |||
pthread_exit(NULL); | pthread_exit(NULL); | ||
} | } | ||
| − | </ | + | </source> |
Latest revision as of 00:00, 16 April 2008
A race between threads and the "exit" call ...
Solaris:
> cc exit_race.c -o exit_race.bin > ./exit_race.bin main - tid: 1 foo - tid: 2 bar - tid: 2 main - ad: 1 Linux: > gcc -g exit_race.c -lpthread > ./exit_race.bin main - tid: b7ddbac0 foo - tid: b7ddab90 bar - tid: b7ddab90 main - ad: 1
#include <pthread.h> #include <stdio.h> #include <stdlib.h> #include <unistd.h> #ifdef __PRETTY_FUNCTION__ # define PFUN __PRETTY_FUNCTION__ #else # define PFUN __func__ #endif static void * foo(void * gr) { fprintf(stderr, "%s - tid: %x\n", PFUN, pthread_self()); sleep(5); exit(0); } static volatile int ad = 0; #ifdef __GNUC__ static void bar(void) __attribute__((destructor)); #endif static void bar(void) { fprintf(stderr, "%s - tid: %x\n", PFUN, pthread_self()); ad = 1; sleep(5); // this just stands for some slow de-initialization } #ifdef __SUNPRO_C # pragma fini(bar) #endif static pthread_t bt; static void main_cleanup(void * gr) { fprintf(stderr, "%s - tid: %x\n", PFUN, pthread_self()); } int main() { fprintf(stderr, "%s - tid: %x\n", PFUN, pthread_self()); pthread_create(&bt, NULL, foo, NULL); while (!ad) ; // Busy wait for ad to change! fprintf(stderr, "%s - ad: %i\n", PFUN, ad); pthread_exit(NULL); }
