38 lines
943 B
C
38 lines
943 B
C
#include <stdio.h>
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#include <pthread.h>
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#include <sys/sysfunc.h>
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__thread volatile int myvalue;
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void * getaddressinthread(void * _unused) {
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fprintf(stderr, "in thread before:\n");
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fprintf(stderr, "&myvalue = %p\n", (void*)&myvalue);
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fprintf(stderr, "myvalue = %d\n", myvalue);
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myvalue = 1234;
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fprintf(stderr, "in thread after:\n");
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fprintf(stderr, "&myvalue = %p\n", (void*)&myvalue);
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fprintf(stderr, "myvalue = %d\n", myvalue);
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return NULL;
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}
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int main(int argc, char * argv[]) {
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myvalue = 42;
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fprintf(stderr, "main thread before:\n");
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fprintf(stderr, "&myvalue = %p\n", (void*)&myvalue);
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fprintf(stderr, "myvalue = %d\n", myvalue);
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pthread_t mythread;
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pthread_create(&mythread, NULL, getaddressinthread, NULL);
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void * retval;
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pthread_join(mythread, &retval);
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fprintf(stderr, "main thread after:\n");
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fprintf(stderr, "&myvalue = %p\n", (void*)&myvalue);
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fprintf(stderr, "myvalue = %d\n", myvalue);
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return 0;
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}
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