| //===----------------------------------------------------------------------===// |
| // |
| // 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 |
| // |
| //===----------------------------------------------------------------------===// |
| /// |
| /// \file |
| /// Syscall wrapper for recvmmsg. |
| /// |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef LLVM_LIBC_SRC___SUPPORT_OSUTIL_SYSCALL_WRAPPERS_RECVMMSG_H |
| #define LLVM_LIBC_SRC___SUPPORT_OSUTIL_SYSCALL_WRAPPERS_RECVMMSG_H |
| |
| #include "hdr/types/struct_mmsghdr.h" |
| #include "hdr/types/struct_timespec.h" |
| #include "src/__support/OSUtil/linux/syscall.h" // For syscall_checked |
| #include "src/__support/macros/config.h" |
| #include <sys/syscall.h> // For syscall numbers |
| |
| namespace LIBC_NAMESPACE_DECL { |
| namespace linux_syscalls { |
| |
| LIBC_INLINE ErrorOr<int> recvmmsg(int sockfd, struct mmsghdr *msgvec, |
| unsigned int vlen, int flags, |
| struct timespec *timeout) { |
| #ifdef SYS_recvmmsg_time64 |
| return syscall_checked<int>(SYS_recvmmsg_time64, sockfd, msgvec, vlen, flags, |
| timeout); |
| #else |
| static_assert( |
| sizeof(timespec::tv_nsec) == sizeof(long), |
| "This legacy syscall fallback is only safe on platforms where tv_nsec " |
| "matches the register size (long). It is unsafe on 32-bit platforms " |
| "with 64-bit tv_nsec."); |
| return syscall_checked<int>(SYS_recvmmsg, sockfd, msgvec, vlen, flags, |
| timeout); |
| #endif |
| } |
| |
| } // namespace linux_syscalls |
| } // namespace LIBC_NAMESPACE_DECL |
| |
| #endif // LLVM_LIBC_SRC___SUPPORT_OSUTIL_SYSCALL_WRAPPERS_RECVMMSG_H |
