mirror of
https://github.com/danieleteti/delphimvcframework.git
synced 2024-11-15 15:55:54 +01:00
114 lines
3.2 KiB
ObjectPascal
114 lines
3.2 KiB
ObjectPascal
// ***************************************************************************
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//
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// Delphi MVC Framework
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//
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// Copyright (c) 2010-2023 Daniele Teti and the DMVCFramework Team
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//
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// https://github.com/danieleteti/delphimvcframework
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//
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// ***************************************************************************
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//
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// *************************************************************************** }
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unit MVCFramework.Signal;
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interface
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procedure WaitForTerminationSignal;
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implementation
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uses
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MVCFramework
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{$IF Defined(MSWINDOWS)}
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,WinAPI.Windows
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{$ENDIF}
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{$IF Defined(LINUX)}
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,Posix.Signal
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{$ENDIF}
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,System.SysUtils
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,System.SyncObjs;
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var
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gEvent: TEvent = nil;
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{$IF Defined(MSWINDOWS)}
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function MSWindowsConsoleCtrlHandler(const dwCtrlType: DWORD): BOOL; stdcall;
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begin
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// https://docs.microsoft.com/en-us/windows/console/handlerroutine
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if dwCtrlType in [CTRL_C_EVENT, CTRL_BREAK_EVENT, CTRL_CLOSE_EVENT] then
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begin
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Assert(gEvent <> nil, 'WaitForTerminationSignal not called');
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gEvent.SetEvent;
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end;
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Result := True;
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{
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If the function handles the control signal, it should return TRUE.
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If it returns FALSE, the next handler function in the list of handlers
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for this process is used.
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}
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end;
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{$ENDIF}
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{$IF Defined(LINUX)}
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procedure HandleSignals(SignalNo: Integer); cdecl;
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begin
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// SIGHUP 1 Hang up detected on controlling terminal or death of controlling process
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// SIGINT 2 Issued if the user sends an interrupt signal (Ctrl + C)
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// SIGQUIT 3 Issued if the user sends a quit signal (Ctrl + D)
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// SIGFPE 8 Issued if an illegal mathematical operation is attempted
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// SIGKILL 9 If a process gets this signal it must quit immediately and will not perform any clean-up operations
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// SIGALRM 14 Alarm clock signal (used for timers)
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// SIGTERM 15 Software termination signal (sent by kill by default)
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if SignalNo in [SIGINT, SIGQUIT, SIGTERM] then
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begin
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Assert(gEvent <> nil, 'WaitForTerminationSignal not called');
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gEvent.SetEvent;
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end;
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end;
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{$ENDIF}
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procedure InstallTerminationSignalHook;
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begin
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{$IF Defined(MSWindows)}
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SetConsoleCtrlHandler(@MSWindowsConsoleCtrlHandler, True { add } );
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{$ENDIF}
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{$IF Defined(LINUX)}
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Signal(SIGINT, @HandleSignals);
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Signal(SIGQUIT, @HandleSignals);
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{$ENDIF}
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end;
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procedure WaitForTerminationSignal;
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begin
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Assert(gEvent = nil, 'WaitForTerminationSignal already called');
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gEvent := TEvent.Create(nil, true, false,'');
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try
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InstallTerminationSignalHook;
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while gEvent.WaitFor(2000) <> TWaitResult.wrSignaled do
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begin
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if IsShuttingDown then
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begin
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Break;
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end;
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end;
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finally
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gEvent.Free;
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end;
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end;
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end.
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