src/system/libroot/os/arch/x86_64/thread.cpp

   1 /*
   2  * Copyright 2012, Alex Smith, alex@alex-smith.me.uk.
   3  * Distributed under the terms of the MIT License.
   4  */
   5
   6
   7 #include <OS.h>
   8 #include "syscalls.h"
   9
  10
  11 thread_id
  12 find_thread(const char* name)
  13 {
  14         if (!name) {
  15                 thread_id thread;
  16                 static_assert(sizeof(thread_id) <= sizeof(uint32_t),
  17                         "thread_id is larger than uint32_t");
  18                 __asm__ __volatile__ ("movl %%fs:8, %0" : "=r" (thread));
  19                 return thread;
  20         }
  21
  22         return _kern_find_thread(name);
  23 }
  24