50 lines
1.0 KiB
C++
50 lines
1.0 KiB
C++
#include <BAN/Assert.h>
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#include <pthread.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/syscall.h>
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#include <unistd.h>
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struct pthread_trampoline_info_t
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{
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void* (*start_routine)(void*);
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void* arg;
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};
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static void pthread_trampoline(void* arg)
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{
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pthread_trampoline_info_t info;
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memcpy(&info, arg, sizeof(pthread_trampoline_info_t));
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free(arg);
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pthread_exit(info.start_routine(info.arg));
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ASSERT_NOT_REACHED();
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}
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int pthread_create(pthread_t* __restrict thread, const pthread_attr_t* __restrict attr, void* (*start_routine)(void*), void* __restrict arg)
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{
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auto* info = static_cast<pthread_trampoline_info_t*>(malloc(sizeof(pthread_trampoline_info_t)));
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if (info == nullptr)
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return -1;
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info->start_routine = start_routine;
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info->arg = arg;
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const auto ret = syscall(SYS_PTHREAD_CREATE, attr, pthread_trampoline, info);
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if (ret == -1)
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{
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free(info);
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return -1;
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}
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if (thread)
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*thread = ret;
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return 0;
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}
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void pthread_exit(void* value_ptr)
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{
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syscall(SYS_PTHREAD_EXIT, value_ptr);
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ASSERT_NOT_REACHED();
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}
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