[libc-commits] [libc] [libc] Assorted improvements to [gs]etitimer (PR #206974)

[Pavel Labath via libc-commits]

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@@ -0,0 +1,55 @@
+//===-- Implementation header for getitimer ---------------------*- C++ -*-===//
+//
+// 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 getitimer.
+///
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_LIBC_SRC___SUPPORT_OSUTIL_SYSCALL_WRAPPERS_GETITIMER_H
+#define LLVM_LIBC_SRC___SUPPORT_OSUTIL_SYSCALL_WRAPPERS_GETITIMER_H
+
+#include "hdr/types/struct_itimerval.h"
+#include "src/__support/OSUtil/linux/syscall.h" // For syscall_checked
+#include "src/__support/common.h"
+#include "src/__support/error_or.h"
+#include "src/__support/macros/config.h"
+#include <sys/syscall.h> // For syscall numbers
+
+namespace LIBC_NAMESPACE_DECL {
+namespace linux_syscalls {
+
+LIBC_INLINE ErrorOr<int> getitimer(int which, struct itimerval *curr_val) {
+  if constexpr (sizeof(time_t) == sizeof(long)) {
+    return syscall_checked<int>(SYS_getitimer, which, curr_val);
+  } else {
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labath wrote:

Not done for now. If still want to do that, I'll send a follow-up.

https://github.com/llvm/llvm-project/pull/206974