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Diff for /parser3/src/main/pa_os.C between versions 1.7 and 1.24

version 1.7, 2004/07/15 06:38:10 version 1.24, 2024/11/04 17:36:49
Line 1 Line 1
 /** @file  /** @file
         Parser: commonly functions.          Parser: commonly functions.
   
         Copyright(c) 2001-2004 ArtLebedev Group (http://www.artlebedev.com)          Copyright (c) 2001-2024 Art. Lebedev Studio (http://www.artlebedev.com)
         Author: Alexandr Petrosian <paf@design.ru> (http://paf.design.ru)          Authors: Konstantin Morshnev <moko@design.ru>, Alexandr Petrosian <paf@design.ru>
 */  */
   
 static const char * const IDENT_COMMON_C="$Date$";   
   
 #include "pa_config_includes.h"  #include "pa_config_includes.h"
 #include "pa_os.h"  #include "pa_os.h"
   
 #       if defined(WIN32)  volatile const char * IDENT_PA_OS_C="$Id$" IDENT_PA_OS_H; 
 #               include <windows.h>  
 #       endif  
   
 #ifdef HAVE_FLOCK  unsigned int pa_lock_attempts=PA_LOCK_ATTEMPTS;
   
   #ifdef _MSC_VER
   #include <windows.h>
   
 int pa_lock_shared_blocking(int fd) { return flock(fd, LOCK_SH); }  #define PA_SH_LOCK 2
 int pa_lock_exclusive_blocking(int fd) { return flock(fd, LOCK_EX); }  #define PA_EX_LOCK 1
 int pa_lock_exclusive_nonblocking(int fd) { return flock(fd, LOCK_EX || LOCK_NB); }  #define PA_ULOCK 0
 int pa_unlock(int fd) { return flock(fd, LOCK_UN); }  #define FLOCK(operation) int status=pa_flock(fd, operation);
   #define ERRNO pa_errno()
   
   int pa_flock(int fd, int operation) {
       HANDLE hFile = (HANDLE)_get_osfhandle(fd);
       if (hFile == INVALID_HANDLE_VALUE) {
           return -1;
       }
   
       OVERLAPPED overlapped = {0};
   
       if (operation == PA_ULOCK) {
           return UnlockFileEx(hFile, 0, MAXDWORD, MAXDWORD, &overlapped) ? 0 : -1;
       } else {
           DWORD flags = LOCKFILE_FAIL_IMMEDIATELY;
           if (operation == PA_EX_LOCK) {
               flags |= LOCKFILE_EXCLUSIVE_LOCK;
           }
           return LockFileEx(hFile, flags, 0, MAXDWORD, MAXDWORD, &overlapped) ? 0 : -1;
       }
   }
   
   int pa_errno() {
       switch(GetLastError()) {
           case ERROR_LOCK_VIOLATION:
           case ERROR_SHARING_VIOLATION:
               return EBUSY;
           case ERROR_IO_PENDING:
               return EAGAIN;
           case ERROR_INVALID_HANDLE:
               return EBADF;
           case ERROR_NOT_LOCKED:
               return ENOLCK;
       }
       return EACCES;
   }
   
 #else  #else
 #ifdef HAVE__LOCKING  
   
 #define FLOCK(operation) lseek(fd, 0, SEEK_SET);  return _locking(fd, operation, 1)  #define ERRNO errno
 int pa_lock_shared_blocking(int fd) { FLOCK(_LK_LOCK); }  
 int pa_lock_exclusive_blocking(int fd) { FLOCK(_LK_LOCK); }  #ifdef HAVE_FLOCK
 int pa_lock_exclusive_nonblocking(int fd) { FLOCK(_LK_NBLCK); }  
 int pa_unlock(int fd) { FLOCK(_LK_UNLCK); }  #define PA_SH_LOCK LOCK_SH|LOCK_NB
   #define PA_EX_LOCK LOCK_EX|LOCK_NB
   #define PA_ULOCK LOCK_UN
   #define FLOCK(operation) int status=flock(fd, operation);
   
 #else  #else
 #ifdef HAVE_FCNTL  #ifdef HAVE_FCNTL
   
 #define FLOCK(cmd, arg) struct flock ls={arg, SEEK_SET};  return fcntl(fd, cmd, &ls)  #define PA_SH_LOCK F_RDLCK
 int pa_lock_shared_blocking(int fd) { FLOCK(F_SETLKW, F_RDLCK); }  #define PA_EX_LOCK F_WRLCK
 int pa_lock_exclusive_blocking(int fd) { FLOCK(F_SETLKW, F_WRLCK); }  #define PA_ULOCK F_UNLCK
 int pa_lock_exclusive_nonblocking(int fd) { FLOCK(F_SETLK, F_RDLCK); }  #define FLOCK(operation) struct flock ls={operation, SEEK_SET}; int status=fcntl(fd, F_SETLK, &ls); 
 int pa_unlock(int fd) { FLOCK(F_SETLK, F_UNLCK); }  
   
 #else  #else
 #ifdef HAVE_LOCKF  #ifdef HAVE_LOCKF
   
 #define FLOCK(fd, operation) lseek(fd, 0, SEEK_SET);  return lockf(fd, operation, 1)  #define PA_SH_LOCK F_TLOCK
 int pa_lock_shared_blocking(int fd) { FLOCK(F_LOCK); } // on intel solaris man doesn't have doc on shared blocking  #define PA_EX_LOCK F_TLOCK
 int pa_lock_exclusive_blocking(int fd) { FLOCK(F_LOCK); }  #define PA_ULOCK F_ULOCK
 int pa_lock_exclusive_nonblocking(int fd) { FLOCK(F_TLOCK); }  #define FLOCK(operation) lseek(fd, 0, SEEK_SET); int status=lockf(fd, operation, 1);
 int pa_unlock(int fd) { FLOCK(F_TLOCK); }  
   
 #else  #else
   
Line 55  int pa_unlock(int fd) { FLOCK(F_TLOCK); Line 89  int pa_unlock(int fd) { FLOCK(F_TLOCK);
 #endif  #endif
 #endif  #endif
 #endif  #endif
   
 #endif  #endif
   
   int pa_lock(int fd, int attempts, int operation){
           while(true){
                   FLOCK(operation);
                   if(status==0)
                           return 0;
                   if(--attempts<=0)
                           return ERRNO;
                   pa_sleep(PA_LOCK_WAIT_TIMEOUT_SECS, PA_LOCK_WAIT_TIMEOUT_USECS);
           }
   };
   
   int pa_lock_shared_blocking(int fd) {
           return pa_lock(fd, pa_lock_attempts, PA_SH_LOCK);
   }
   
   int pa_lock_exclusive_blocking(int fd) {
           return pa_lock(fd, pa_lock_attempts, PA_EX_LOCK);
   }
   
   int pa_lock_exclusive_nonblocking(int fd) {
           return pa_lock(fd, 1, PA_EX_LOCK);
   }
   
   int pa_unlock(int fd) {
           return pa_lock(fd, 1, PA_ULOCK);
   }
   
   
 int pa_sleep(unsigned long secs, unsigned long usecs) {  int pa_sleep(unsigned long secs, unsigned long usecs) {
         for (;  usecs >= 1000000; ++secs, usecs -= 1000000);           if(usecs >= 1000000){
                           secs += usecs/1000000;
                           usecs = usecs%1000000;
           }
   
 #ifdef WIN32  #ifdef _MSC_VER
         Sleep(secs * 1000 + usecs / 1000);           Sleep(secs * 1000 + usecs / 1000); 
         return 0;          return 0;
 #else  #else
Removed from v.1.7  
changed lines
  Added in v.1.24

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