Mercurial > hg > CbC > CbC_gcc
comparison gcc/ada/libgnat/g-locfil.ads @ 111:04ced10e8804
gcc 7
| author | kono |
|---|---|
| date | Fri, 27 Oct 2017 22:46:09 +0900 |
| parents | |
| children | 84e7813d76e9 |
comparison
equal
deleted
inserted
replaced
| 68:561a7518be6b | 111:04ced10e8804 |
|---|---|
| 1 ------------------------------------------------------------------------------ | |
| 2 -- -- | |
| 3 -- GNAT COMPILER COMPONENTS -- | |
| 4 -- -- | |
| 5 -- G N A T . L O C K _ F I L E S -- | |
| 6 -- -- | |
| 7 -- S p e c -- | |
| 8 -- -- | |
| 9 -- Copyright (C) 1995-2017, AdaCore -- | |
| 10 -- -- | |
| 11 -- GNAT is free software; you can redistribute it and/or modify it under -- | |
| 12 -- terms of the GNU General Public License as published by the Free Soft- -- | |
| 13 -- ware Foundation; either version 3, or (at your option) any later ver- -- | |
| 14 -- sion. GNAT is distributed in the hope that it will be useful, but WITH- -- | |
| 15 -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY -- | |
| 16 -- or FITNESS FOR A PARTICULAR PURPOSE. -- | |
| 17 -- -- | |
| 18 -- As a special exception under Section 7 of GPL version 3, you are granted -- | |
| 19 -- additional permissions described in the GCC Runtime Library Exception, -- | |
| 20 -- version 3.1, as published by the Free Software Foundation. -- | |
| 21 -- -- | |
| 22 -- You should have received a copy of the GNU General Public License and -- | |
| 23 -- a copy of the GCC Runtime Library Exception along with this program; -- | |
| 24 -- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see -- | |
| 25 -- <http://www.gnu.org/licenses/>. -- | |
| 26 -- -- | |
| 27 -- GNAT was originally developed by the GNAT team at New York University. -- | |
| 28 -- Extensive contributions were provided by Ada Core Technologies Inc. -- | |
| 29 -- -- | |
| 30 ------------------------------------------------------------------------------ | |
| 31 | |
| 32 -- This package contains the necessary routines for using files for the | |
| 33 -- purpose of providing reliable system wide locking capability. | |
| 34 | |
| 35 package GNAT.Lock_Files is | |
| 36 pragma Preelaborate; | |
| 37 | |
| 38 Lock_Error : exception; | |
| 39 -- Exception raised if file cannot be locked | |
| 40 | |
| 41 subtype Path_Name is String; | |
| 42 -- Pathname is used by all services provided in this unit to specify | |
| 43 -- directory name and file name. On DOS based systems both directory | |
| 44 -- separators are handled (i.e. slash and backslash). | |
| 45 | |
| 46 procedure Lock_File | |
| 47 (Directory : Path_Name; | |
| 48 Lock_File_Name : Path_Name; | |
| 49 Wait : Duration := 1.0; | |
| 50 Retries : Natural := Natural'Last); | |
| 51 -- Create a lock file Lock_File_Name in directory Directory. If the file | |
| 52 -- cannot be locked because someone already owns the lock, this procedure | |
| 53 -- waits Wait seconds and retries at most Retries times. If the file | |
| 54 -- still cannot be locked, Lock_Error is raised. The default is to try | |
| 55 -- every second, almost forever (Natural'Last times). The full path of | |
| 56 -- the file is constructed by concatenating Directory and Lock_File_Name. | |
| 57 -- Directory can optionally terminate with a directory separator. | |
| 58 | |
| 59 procedure Lock_File | |
| 60 (Lock_File_Name : Path_Name; | |
| 61 Wait : Duration := 1.0; | |
| 62 Retries : Natural := Natural'Last); | |
| 63 -- See above. The full lock file path is given as one string | |
| 64 | |
| 65 procedure Unlock_File (Directory : Path_Name; Lock_File_Name : Path_Name); | |
| 66 -- Unlock a file. Directory can optionally terminate with a directory | |
| 67 -- separator. | |
| 68 | |
| 69 procedure Unlock_File (Lock_File_Name : Path_Name); | |
| 70 -- Unlock a file whose full path is given in Lock_File_Name | |
| 71 | |
| 72 end GNAT.Lock_Files; |