rosetta/lib/libc/pthread/thread/pthread_self.c

#include "pthread.h"

#include <mango/task.h>
#include <mango/types.h>
#include <string.h>
#include <sys/mman.h>

static struct __pthread main_thread = {0};

struct __pthread *pthread_self(void)
{
	static int init = 0;
	if (!init) {
		kern_handle_t self_handle = KERN_HANDLE_INVALID;
		kern_status_t status = thread_self(&self_handle);
		if (status != KERN_OK) {
			/* TODO set an errno value in a way that doesn't result
			 * in a recursive call to pthread_self */
			return NULL;
		}
		struct __pthread *self = &main_thread;
		self->thr_self = self;
		self->thr_handle = self_handle;
		self->thr_map_base = self;
		self->thr_map_size = sizeof *self;
		thread_config_set(
			self_handle,
			THREAD_CFG_GSBASE,
			&self,
			sizeof(void *));
		init = 1;
		return self;
	}

	return __pthread_self();
}