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author | Andreas Jaeger <aj@suse.de> | 2000-12-27 17:14:56 +0000 |
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committer | Andreas Jaeger <aj@suse.de> | 2000-12-27 17:14:56 +0000 |
commit | a375a533a2445079390907b962464a379d25f5d5 (patch) | |
tree | d781d06615c1d76d029c48e1d7eb69dc21ecbf3d /linuxthreads/Examples/ex4.c | |
parent | 21112857299d8a7b9c04fcb2027ae5186acfcf4f (diff) | |
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* Examples/ex13.c: Make local functions static.
* ecmutex.c: Likewise.
* Examples/ex14.c: Likewise.
* Examples/ex2.c: Make local functions static; reformat.
* Examples/ex1.c: Likewise.
* Examples/ex4.c: Likewise.
* Examples/ex5.c: Likewise.
* Examples/ex7.c: Likewise.
CVS ----------------------------------------------------------------------
Diffstat (limited to 'linuxthreads/Examples/ex4.c')
-rw-r--r-- | linuxthreads/Examples/ex4.c | 84 |
1 files changed, 46 insertions, 38 deletions
diff --git a/linuxthreads/Examples/ex4.c b/linuxthreads/Examples/ex4.c index 86584de70d..5c8b929e22 100644 --- a/linuxthreads/Examples/ex4.c +++ b/linuxthreads/Examples/ex4.c @@ -14,10 +14,11 @@ #if 0 -char * str_accumulate(char * s) +char * +str_accumulate (char *s) { static char accu[1024] = { 0 }; - strcat(accu, s); + strcat (accu, s); return accu; } @@ -35,73 +36,80 @@ static pthread_key_t str_key; static pthread_once_t str_alloc_key_once = PTHREAD_ONCE_INIT; /* Forward functions */ -static void str_alloc_key(void); -static void str_alloc_destroy_accu(void * accu); +static void str_alloc_key (void); +static void str_alloc_destroy_accu (void *accu); /* Thread-safe version of str_accumulate */ -char * str_accumulate(const char * s) +static char * +str_accumulate (const char *s) { - char * accu; + char *accu; /* Make sure the key is allocated */ - pthread_once(&str_alloc_key_once, str_alloc_key); + pthread_once (&str_alloc_key_once, str_alloc_key); /* Get the thread-specific data associated with the key */ - accu = (char *) pthread_getspecific(str_key); + accu = (char *) pthread_getspecific (str_key); /* It's initially NULL, meaning that we must allocate the buffer first. */ - if (accu == NULL) { - accu = malloc(1024); - if (accu == NULL) return NULL; - accu[0] = 0; - /* Store the buffer pointer in the thread-specific data. */ - pthread_setspecific(str_key, (void *) accu); - printf("Thread %lx: allocating buffer at %p\n", pthread_self(), accu); - } + if (accu == NULL) + { + accu = malloc (1024); + if (accu == NULL) + return NULL; + accu[0] = 0; + /* Store the buffer pointer in the thread-specific data. */ + pthread_setspecific (str_key, (void *) accu); + printf ("Thread %lx: allocating buffer at %p\n", pthread_self (), accu); + } /* Now we can use accu just as in the non thread-safe code. */ - strcat(accu, s); + strcat (accu, s); return accu; } /* Function to allocate the key for str_alloc thread-specific data. */ -static void str_alloc_key(void) +static void +str_alloc_key (void) { - pthread_key_create(&str_key, str_alloc_destroy_accu); - printf("Thread %lx: allocated key %d\n", pthread_self(), str_key); + pthread_key_create (&str_key, str_alloc_destroy_accu); + printf ("Thread %lx: allocated key %d\n", pthread_self (), str_key); } /* Function to free the buffer when the thread exits. */ /* Called only when the thread-specific data is not NULL. */ -static void str_alloc_destroy_accu(void * accu) +static void +str_alloc_destroy_accu (void *accu) { - printf("Thread %lx: freeing buffer at %p\n", pthread_self(), accu); - free(accu); + printf ("Thread %lx: freeing buffer at %p\n", pthread_self (), accu); + free (accu); } /* Test program */ -void * process(void * arg) +static void * +process (void *arg) { - char * res; - res = str_accumulate("Result of "); - res = str_accumulate((char *) arg); - res = str_accumulate(" thread"); - printf("Thread %lx: \"%s\"\n", pthread_self(), res); + char *res; + res = str_accumulate ("Result of "); + res = str_accumulate ((char *) arg); + res = str_accumulate (" thread"); + printf ("Thread %lx: \"%s\"\n", pthread_self (), res); return NULL; } -int main(int argc, char ** argv) +int +main (int argc, char **argv) { - char * res; + char *res; pthread_t th1, th2; - res = str_accumulate("Result of "); - pthread_create(&th1, NULL, process, (void *) "first"); - pthread_create(&th2, NULL, process, (void *) "second"); - res = str_accumulate("initial thread"); - printf("Thread %lx: \"%s\"\n", pthread_self(), res); - pthread_join(th1, NULL); - pthread_join(th2, NULL); + res = str_accumulate ("Result of "); + pthread_create (&th1, NULL, process, (void *) "first"); + pthread_create (&th2, NULL, process, (void *) "second"); + res = str_accumulate ("initial thread"); + printf ("Thread %lx: \"%s\"\n", pthread_self (), res); + pthread_join (th1, NULL); + pthread_join (th2, NULL); return 0; } |