xref: /aosp_15_r20/external/llvm-libc/src/signal/linux/sigprocmask.cpp (revision 71db0c75aadcf003ffe3238005f61d7618a3fead)

//===-- Linux implementation of sigprocmask -------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//

#include "src/signal/sigprocmask.h"

#include "hdr/types/sigset_t.h"
#include "src/__support/OSUtil/syscall.h" // For internal syscall function.
#include "src/__support/common.h"
#include "src/__support/macros/config.h"
#include "src/errno/libc_errno.h"
#include "src/signal/linux/signal_utils.h"

#include <sys/syscall.h> // For syscall numbers.

namespace LIBC_NAMESPACE_DECL {

LLVM_LIBC_FUNCTION(int, sigprocmask,
                   (int how, const sigset_t *__restrict set,
                    sigset_t *__restrict oldset)) {
  int ret = LIBC_NAMESPACE::syscall_impl<int>(SYS_rt_sigprocmask, how, set,
                                              oldset, sizeof(sigset_t));
  if (!ret)
    return 0;

  libc_errno = -ret;
  return -1;
}

} // namespace LIBC_NAMESPACE_DECL