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authorWaldemar Brodkorb <wbx@uclibc-ng.org>2016-10-28 20:29:21 +0200
committerWaldemar Brodkorb <wbx@uclibc-ng.org>2016-10-28 20:31:55 +0200
commit99ef2719fb3d703fe38c4113cd7f5adec516dd3a (patch)
tree2c1f77cb41b60ccbf8faa77a3640491a3546b546 /test/pthread/ex4.c
parent543308f6c46cf2edf8a524bc9c631e472570fe72 (diff)
test: remove test suite
The test suite is now a developed in a separate git repository. See here: http://cgit.uclibc-ng.org/cgi/cgit/uclibc-ng-test.git The test suite should be just like every other software compiled with the cross-toolchain. In the past strange problems where found when the test suite got build in the toolchain creation step.
Diffstat (limited to 'test/pthread/ex4.c')
-rw-r--r--test/pthread/ex4.c107
1 files changed, 0 insertions, 107 deletions
diff --git a/test/pthread/ex4.c b/test/pthread/ex4.c
deleted file mode 100644
index cf4cf1d69..000000000
--- a/test/pthread/ex4.c
+++ /dev/null
@@ -1,107 +0,0 @@
-/* Making a library function that uses static variables thread-safe.
- Illustrates: thread-specific data, pthread_once(). */
-
-#include <stddef.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <pthread.h>
-
-/* This is a typical example of a library function that uses
- static variables to accumulate results between calls.
- Here, it just returns the concatenation of all string arguments
- that were given to it. */
-
-#if 0
-
-static char * str_accumulate(char * s)
-{
- static char accu[1024] = { 0 };
- strcat(accu, s);
- return accu;
-}
-
-#endif
-
-/* Of course, this cannot be used in a multi-threaded program
- because all threads store "accu" at the same location.
- So, we'll use thread-specific data to have a different "accu"
- for each thread. */
-
-/* Key identifying the thread-specific data */
-static pthread_key_t str_key;
-/* "Once" variable ensuring that the key for str_alloc will be allocated
- exactly once. */
-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);
-
-/* Thread-safe version of str_accumulate */
-
-static char * str_accumulate(const char * s)
-{
- char * accu;
-
- /* Make sure the key is allocated */
- pthread_once(&str_alloc_key_once, str_alloc_key);
- /* Get the thread-specific data associated with the 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);
- }
- /* Now we can use accu just as in the non thread-safe code. */
- strcat(accu, s);
- return accu;
-}
-
-/* Function to allocate the key for str_alloc thread-specific data. */
-
-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);
-}
-
-/* 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)
-{
- printf("Thread %lx: freeing buffer at %p\n", pthread_self(), accu);
- free(accu);
-}
-
-/* Test program */
-
-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);
- return NULL;
-}
-
-int main(int argc, char ** argv)
-{
- 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);
- exit(0);
-}