diff options
Diffstat (limited to 'test')
-rw-r--r-- | test/monniaux/volatile/volatile.c | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/test/monniaux/volatile/volatile.c b/test/monniaux/volatile/volatile.c new file mode 100644 index 00000000..75f8ce3b --- /dev/null +++ b/test/monniaux/volatile/volatile.c @@ -0,0 +1,32 @@ +#include <pthread.h> +#include <stdio.h> +#include <time.h> + +#define VOLATILE volatile + +typedef unsigned data; + +static data powm(data x, unsigned e, data m) { + data y = 1; + for(unsigned i=0; i<e; i++) { + y = (y * x) % m; + } + return y; +} + +void* second_thread_entry(void *ptr) { + *((data*) ptr) = powm(3, 65536, 65537); + return NULL; +} + +int main() { + pthread_t second_thread_id; + VOLATILE data value; + pthread_create(&second_thread_id, NULL, + second_thread_entry, (void*) &value); + value = 0; + data correct = powm(3, 65536*4, 65537);; + data read = value; + pthread_join(second_thread_id, NULL); + printf("%u %u\n", correct, read); +} |