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Kernel+LibPthread: Implement pthread_join()
It's now possible to block until another thread in the same process has exited. We can also retrieve its exit value, which is whatever value it passed to pthread_exit(). :^)
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9 changed files with 117 additions and 5 deletions
25
Userland/tt.cpp
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25
Userland/tt.cpp
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#include <pthread.h>
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#include <stdio.h>
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int main(int, char**)
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{
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printf("Hello from the first thread!\n");
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pthread_t thread_id;
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int rc = pthread_create(&thread_id, nullptr, [](void*) -> void* {
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printf("Hi there, from the second thread!\n");
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pthread_exit((void*)0xDEADBEEF);
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return nullptr;
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}, nullptr);
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if (rc < 0) {
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perror("pthread_create");
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return 1;
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}
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void* retval;
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rc = pthread_join(thread_id, &retval);
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if (rc < 0) {
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perror("pthread_join");
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return 1;
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}
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printf("Okay, joined and got retval=%p\n", retval);
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return 0;
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}
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