osdMutex.c File Reference

#include <stdio.h>
#include <limits.h>
#include <windows.h>
#include "libComAPI.h"
#include "epicsMutex.h"
#include "epicsAssert.h"
#include "epicsStdio.h"

Include dependency graph for osdMutex.c:

Go to the source code of this file.

Classes
struct	epicsMutexOSD

Macros
#define	VC_EXTRALEAN
#define	STRICT
#define	_WIN32_WINNT   0x0400

Typedefs
typedef struct epicsMutexOSD	epicsMutexOSD

Functions
epicsMutexOSD *	epicsMutexOsdCreate (void)
void	epicsMutexOsdDestroy (epicsMutexOSD *pSem)
void	epicsMutexOsdUnlock (epicsMutexOSD *pSem)
epicsMutexLockStatus	epicsMutexOsdLock (epicsMutexOSD *pSem)
epicsMutexLockStatus	epicsMutexOsdTryLock (epicsMutexOSD *pSem)
void	epicsMutexOsdShow (epicsMutexOSD *pSem, unsigned level)

Macro Definition Documentation

#define _WIN32_WINNT   0x0400

Definition at line 41 of file osdMutex.c.

#define STRICT

Definition at line 24 of file osdMutex.c.

#define VC_EXTRALEAN

Definition at line 23 of file osdMutex.c.

Typedef Documentation

typedef struct epicsMutexOSD epicsMutexOSD

Function Documentation

epicsMutexOSD* epicsMutexOsdCreate

(

void

)

The following are interfaces to the OS dependent implementation and should NOT be called directly by user code.

Definition at line 63 of file osdMutex.c.

{
    epicsMutexOSD * pSem;

    if ( ! weHaveInitialized ) {
        BOOL status;
        OSVERSIONINFO osInfo;
        osInfo.dwOSVersionInfoSize = sizeof ( OSVERSIONINFO );
        status = GetVersionEx ( & osInfo );
        thisIsNT = status && ( osInfo.dwPlatformId == VER_PLATFORM_WIN32_NT );
        weHaveInitialized = 1;
    }

    pSem = malloc ( sizeof (*pSem) );
    if ( pSem ) {
        if ( thisIsNT ) {
            InitializeCriticalSection ( &pSem->os.criticalSection );
        }
        else {
            pSem->os.mutex = CreateMutex ( NULL, FALSE, NULL );
            if ( pSem->os.mutex == 0 ) {
                free ( pSem );
                pSem = 0;
            }
        }
    }
    return pSem;
}

void epicsMutexOsdDestroy

(

epicsMutexOSD *

pSem

)

Definition at line 95 of file osdMutex.c.

{
    if ( thisIsNT ) {
        DeleteCriticalSection  ( &pSem->os.criticalSection );
    }
    else {
        CloseHandle ( pSem->os.mutex );
    }
    free ( pSem );
}

epicsMutexLockStatus epicsMutexOsdLock

(

epicsMutexOSD *

pSem

)

Definition at line 123 of file osdMutex.c.

{
    if ( thisIsNT ) {
        EnterCriticalSection ( &pSem->os.criticalSection );
    }
    else {
        DWORD status = WaitForSingleObject ( pSem->os.mutex, INFINITE );
        if ( status != WAIT_OBJECT_0 ) {
            return epicsMutexLockError;
        }
    }
    return epicsMutexLockOK;
}

void epicsMutexOsdShow	(	epicsMutexOSD *	pSem,
		unsigned	level
	)

Definition at line 167 of file osdMutex.c.

{
    if ( thisIsNT ) {
        printf ("epicsMutex: win32 critical section at %p\n",
            (void * ) & pSem->os.criticalSection );
    }
    else {
        printf ( "epicsMutex: win32 mutex at %p\n",
            ( void * ) pSem->os.mutex );
    }
}

epicsMutexLockStatus epicsMutexOsdTryLock

(

epicsMutexOSD *

pSem

)

Definition at line 140 of file osdMutex.c.

{
    if ( thisIsNT ) {
        if ( TryEnterCriticalSection ( &pSem->os.criticalSection ) ) {
            return epicsMutexLockOK;
        }
        else {
            return epicsMutexLockTimeout;
        }
    }
    else {
        DWORD status = WaitForSingleObject ( pSem->os.mutex, 0 );
        if ( status != WAIT_OBJECT_0 ) {
            if (status == WAIT_TIMEOUT) {
                return epicsMutexLockTimeout;
            }
            else {
                return epicsMutexLockError;
            }
        }
    }
    return epicsMutexLockOK;
}

void epicsMutexOsdUnlock

(

epicsMutexOSD *

pSem

)

Definition at line 109 of file osdMutex.c.

{
    if ( thisIsNT ) {
        LeaveCriticalSection ( &pSem->os.criticalSection );
    }
    else {
        BOOL success = ReleaseMutex ( pSem->os.mutex );
        assert ( success );
    }
}