libc/src/pthread/pthread_attr_setstack.cpp

   1 //===-- Implementation of the pthread_attr_setstack -----------------===//
   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_attr_setstack.h"
  10
  11 #include "src/__support/common.h"
  12
  13 #include <errno.h>
  14 #include <linux/param.h> // For EXEC_PAGESIZE.
  15 #include <pthread.h>
  16 #include <stdint.h>
  17
  18 namespace __llvm_libc {
  19
  20 LLVM_LIBC_FUNCTION(int, pthread_attr_setstack,
  21                    (pthread_attr_t *__restrict attr, void *stack,
  22                     size_t stacksize)) {
  23   if (stacksize < PTHREAD_STACK_MIN)
  24     return EINVAL;
  25   uintptr_t stackaddr = reinterpret_cast<uintptr_t>(stack);
  26   if ((stackaddr % 16 != 0) || ((stackaddr + stacksize) % 16 != 0))
  27     return EINVAL;
  28   attr->__stack = stack;
  29   attr->__stacksize = stacksize;
  30   return 0;
  31 }
  32
  33 } // namespace __llvm_libc