1 //===-- Linux implementation of sigprocmask -------------------------------===// 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 "src/signal/sigprocmask.h" 10 11 #include "hdr/types/sigset_t.h" 12 #include "src/__support/OSUtil/syscall.h" // For internal syscall function. 13 #include "src/__support/common.h" 14 #include "src/__support/macros/config.h" 15 #include "src/errno/libc_errno.h" 16 #include "src/signal/linux/signal_utils.h" 17 18 #include <sys/syscall.h> // For syscall numbers. 19 20 namespace LIBC_NAMESPACE_DECL { 21 22 LLVM_LIBC_FUNCTION(int, sigprocmask, 23 (int how, const sigset_t *__restrict set, 24 sigset_t *__restrict oldset)) { 25 int ret = LIBC_NAMESPACE::syscall_impl<int>(SYS_rt_sigprocmask, how, set, 26 oldset, sizeof(sigset_t)); 27 if (!ret) 28 return 0; 29 30 libc_errno = -ret; 31 return -1; 32 } 33 34 } // namespace LIBC_NAMESPACE_DECL 35