Support: Remove Alarm. It is unused (via local grep and google code search).
llvm-svn: 121160
This commit is contained in:
Michael J. Spencer
parent
14a49e2fbe
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8b5defbd5d
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//===- llvm/Support/Alarm.h - Alarm Generation support ----------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file provides an operating system independent interface to alarm(2)
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// type functionality. The Alarm class allows a one-shot alarm to be set up
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// at some number of seconds in the future. When the alarm triggers, a method
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// is called to process the event
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_SYSTEM_ALARM_H
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#define LLVM_SYSTEM_ALARM_H
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namespace llvm {
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namespace sys {
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/// This function registers an alarm to trigger some number of \p seconds in
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/// the future. When that time arrives, the AlarmStatus function will begin
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/// to return 1 instead of 0. The user must poll the status of the alarm by
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/// making occasional calls to AlarmStatus. If the user sends an interrupt
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/// signal, AlarmStatus will begin returning -1, even if the alarm event
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/// occurred.
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/// @returns nothing
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void SetupAlarm(
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unsigned seconds ///< Number of seconds in future when alarm arrives
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);
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/// This function terminates the alarm previously set up
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/// @returns nothing
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void TerminateAlarm();
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/// This function acquires the status of the alarm.
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/// @returns -1=cancelled, 0=untriggered, 1=triggered
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int AlarmStatus();
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/// Sleep for n seconds. Warning: mixing calls to Sleep() and other *Alarm
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/// calls may be a bad idea on some platforms (source: Linux man page).
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/// @returns nothing.
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void Sleep(unsigned n);
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} // End sys namespace
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} // End llvm namespace
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#endif
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@ -1,33 +0,0 @@
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//===- Alarm.cpp - Alarm Generation Support ---------------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file implements the Alarm functionality
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/Support/Alarm.h"
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#include "llvm/Config/config.h"
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namespace llvm {
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using namespace sys;
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//===----------------------------------------------------------------------===//
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//=== WARNING: Implementation here must contain only TRULY operating system
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//=== independent code.
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//===----------------------------------------------------------------------===//
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}
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// Include the platform-specific parts of this class.
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#ifdef LLVM_ON_UNIX
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#include "Unix/Alarm.inc"
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#endif
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#ifdef LLVM_ON_WIN32
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#include "Windows/Alarm.inc"
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#endif
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@ -54,7 +54,6 @@ add_llvm_library(LLVMSupport
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regstrlcpy.c
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# System
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Alarm.cpp
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Atomic.cpp
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Disassembler.cpp
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DynamicLibrary.cpp
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@ -75,7 +74,6 @@ add_llvm_library(LLVMSupport
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Threading.cpp
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TimeValue.cpp
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Valgrind.cpp
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Unix/Alarm.inc
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Unix/Host.inc
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Unix/Memory.inc
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Unix/Mutex.inc
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@ -88,7 +86,6 @@ add_llvm_library(LLVMSupport
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Unix/system_error.inc
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Unix/ThreadLocal.inc
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Unix/TimeValue.inc
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Windows/Alarm.inc
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Windows/DynamicLibrary.inc
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Windows/Host.inc
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Windows/Memory.inc
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@ -1,72 +0,0 @@
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//===-- Alarm.inc - Implement Unix Alarm Support ----------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file implements the UNIX Alarm support.
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//
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//===----------------------------------------------------------------------===//
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#include <signal.h>
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#include <unistd.h>
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#include <cassert>
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using namespace llvm;
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/// AlarmCancelled - This flag is set by the SIGINT signal handler if the
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/// user presses CTRL-C.
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static volatile bool AlarmCancelled = false;
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/// AlarmTriggered - This flag is set by the SIGALRM signal handler if the
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/// alarm was triggered.
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static volatile bool AlarmTriggered = false;
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/// NestedSOI - Sanity check. Alarms cannot be nested or run in parallel.
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/// This ensures that they never do.
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static bool NestedSOI = false;
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static RETSIGTYPE SigIntHandler(int Sig) {
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AlarmCancelled = true;
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signal(SIGINT, SigIntHandler);
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}
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static RETSIGTYPE SigAlarmHandler(int Sig) {
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AlarmTriggered = true;
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}
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static void (*OldSigIntHandler) (int);
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void sys::SetupAlarm(unsigned seconds) {
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assert(!NestedSOI && "sys::SetupAlarm calls cannot be nested!");
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NestedSOI = true;
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AlarmCancelled = false;
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AlarmTriggered = false;
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::signal(SIGALRM, SigAlarmHandler);
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OldSigIntHandler = ::signal(SIGINT, SigIntHandler);
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::alarm(seconds);
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}
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void sys::TerminateAlarm() {
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assert(NestedSOI && "sys::TerminateAlarm called without sys::SetupAlarm!");
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::alarm(0);
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::signal(SIGALRM, SIG_DFL);
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::signal(SIGINT, OldSigIntHandler);
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AlarmCancelled = false;
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AlarmTriggered = false;
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NestedSOI = false;
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}
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int sys::AlarmStatus() {
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if (AlarmCancelled)
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return -1;
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if (AlarmTriggered)
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return 1;
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return 0;
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}
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void sys::Sleep(unsigned n) {
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::sleep(n);
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}
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@ -1,43 +0,0 @@
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//===-- Alarm.inc - Implement Win32 Alarm Support ---------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file implements the Win32 Alarm support.
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//
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//===----------------------------------------------------------------------===//
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#include <cassert>
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using namespace llvm;
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/// NestedSOI - Sanity check. Alarms cannot be nested or run in parallel.
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/// This ensures that they never do.
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static bool NestedSOI = false;
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void sys::SetupAlarm(unsigned seconds) {
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assert(!NestedSOI && "sys::SetupAlarm calls cannot be nested!");
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NestedSOI = true;
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// FIXME: Implement for Win32
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}
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void sys::TerminateAlarm() {
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assert(NestedSOI && "sys::TerminateAlarm called without sys::SetupAlarm!");
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// FIXME: Implement for Win32
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NestedSOI = false;
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}
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int sys::AlarmStatus() {
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// FIXME: Implement for Win32
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return 0;
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}
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// Don't pull in all of the Windows headers.
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extern "C" void __stdcall Sleep(unsigned long);
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void sys::Sleep(unsigned n) {
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::Sleep(n*1000);
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}
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