libc/src/pthread/pthread_getname_np.cpp

   1 //===-- Linux implementation of the pthread_setname_np function -----------===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8
   9 #include "pthread_getname_np.h"
  10
  11 #include "src/__support/CPP/span.h"
  12 #include "src/__support/CPP/stringstream.h"
  13 #include "src/__support/common.h"
  14 #include "src/__support/threads/thread.h"
  15
  16 #include <pthread.h>
  17 #include <stddef.h>
  18
  19 namespace __llvm_libc {
  20
  21 static_assert(sizeof(pthread_t) == sizeof(__llvm_libc::Thread),
  22               "Mismatch between pthread_t and internal Thread.");
  23
  24 LLVM_LIBC_FUNCTION(int, pthread_getname_np,
  25                    (pthread_t th, char *buf, size_t len)) {
  26   auto *thread = reinterpret_cast<__llvm_libc::Thread *>(&th);
  27   cpp::span<char> name_buf(buf, len);
  28   cpp::StringStream name_stream(name_buf);
  29   return thread->get_name(name_stream);
  30 }
  31
  32 } // namespace __llvm_libc