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/*++
Copyright (c) 1997 Microsoft Corporation
Module Name:
win32obj.c
Abstract:
This module contains helper functions for creating debug-specific named Win32 objects. Functions are included for named events, semaphores, and mutexes.
Object names created by these routines have the following format:
filename.ext:line_number member:address PID:pid
Where:
filename.ext = The file name where the object was created.
line_number = The line number within the file.
member = The member/global variable name where the handle is stored. This name is provided by the caller, but is usually of the form "g_Global" for globals and "CLASS::m_Member" for class members.
address = An address, used to guarantee uniqueness of the objects created. This is provided by the caller. For global variables, this is typically the address of the global. For class members, this is typically the address of the containing class.
pid = The current process ID. This ensures uniqueness across all processes.
Here are a couple of examples:
main.cxx:796 g_hShutdownEvent:683a42bc PID:373
resource.cxx:136 RTL_RESOURCE::SharedSemaphore:00250970 PID:373
Author:
Keith Moore (keithmo) 23-Sep-1997
Revision History:
--*/
#include <nt.h>
#include <ntrtl.h>
#include <nturtl.h>
#include <windows.h>
#include <pudebug.h>
#define MAX_OBJECT_NAME 256 // chars
LONG g_PuDbgEventsCreated = 0;LONG g_PuDbgSemaphoresCreated = 0;LONG g_PuDbgMutexesCreated = 0;
LPSTRPuDbgpBuildObjectName( IN LPSTR ObjectNameBuffer, IN LPSTR FileName, IN ULONG LineNumber, IN LPSTR MemberName, IN PVOID Address )
/*++
Routine Description:
Internal routine that builds an appropriate object name based on the file name, line number, member name, address, and process ID.
Arguments:
ObjectNameBuffer - Pointer to the target buffer for the name.
FileName - The filename of the source creating the object. This is __FILE__ of the caller.
LineNumber - The line number within the source. This is __LINE__ of the caller.
MemberName - The member/global variable name where the object handle is to be stored.
Address - The address of the containing structure/class or of the global itself.
Return Value:
LPSTR - Pointer to ObjectNameBuffer if successful, NULL otherwise.
N.B. This routine always returns NULL when running under Win9x.
--*/
{
PLATFORM_TYPE platformType; LPSTR fileNamePart; LPSTR result;
//
// We have no convenient way to dump objects w/ names from
// Win9x, so we'll only enable this functionality under NT.
//
platformType = IISGetPlatformType(); result = NULL;
if( platformType == PtNtServer || platformType == PtNtWorkstation ) {
//
// Find the filename part of the incoming source file name.
//
fileNamePart = strrchr( FileName, '\\' );
if( fileNamePart == NULL ) { fileNamePart = strrchr( FileName, '/' ); }
if( fileNamePart == NULL ) { fileNamePart = strrchr( FileName, ':' ); }
if( fileNamePart == NULL ) { fileNamePart = FileName; } else { fileNamePart++; }
//
// Ensure we don't overwrite our object name buffer.
//
if( ( sizeof(":1234567890 :12345678 PID:1234567890") + strlen( fileNamePart ) + strlen( MemberName ) ) < MAX_OBJECT_NAME ) {
wsprintfA( ObjectNameBuffer, "%s:%lu %s:%08lx PID:%lu", fileNamePart, LineNumber, MemberName, Address, GetCurrentProcessId() );
result = ObjectNameBuffer;
}
}
return result;
} // PuDbgpBuildObjectName
HANDLEPuDbgCreateEvent( IN LPSTR FileName, IN ULONG LineNumber, IN LPSTR MemberName, IN PVOID Address, IN BOOL ManualReset, IN BOOL InitialState )
/*++
Routine Description:
Creates a new event object.
Arguments:
FileName - The filename of the source creating the object. This is __FILE__ of the caller.
LineNumber - The line number within the source. This is __LINE__ of the caller.
MemberName - The member/global variable name where the object handle is to be stored.
Address - The address of the containing structure/class or of the global itself.
ManualReset - TRUE to create a manual reset event, FALSE to create an automatic reset event.
InitialState - The intitial state of the event object.
Return Value:
HANDLE - Handle to the object if successful, NULL otherwise.
--*/
{
LPSTR objName; HANDLE objHandle; CHAR objNameBuffer[MAX_OBJECT_NAME];
objName = PuDbgpBuildObjectName( objNameBuffer, FileName, LineNumber, MemberName, Address );
objHandle = CreateEventA( NULL, // lpEventAttributes
ManualReset, // bManualReset
InitialState, // bInitialState
objName // lpName
);
if( objHandle != NULL ) { InterlockedIncrement( &g_PuDbgEventsCreated ); }
return objHandle;
} // PuDbgCreateEvent
HANDLEPuDbgCreateSemaphore( IN LPSTR FileName, IN ULONG LineNumber, IN LPSTR MemberName, IN PVOID Address, IN LONG InitialCount, IN LONG MaximumCount )
/*++
Routine Description:
Creates a new semaphore object.
Arguments:
FileName - The filename of the source creating the object. This is __FILE__ of the caller.
LineNumber - The line number within the source. This is __LINE__ of the caller.
MemberName - The member/global variable name where the object handle is to be stored.
Address - The address of the containing structure/class or of the global itself.
InitialCount - The initial count of the semaphore.
MaximumCount - The maximum count of the semaphore.
Return Value:
HANDLE - Handle to the object if successful, NULL otherwise.
--*/
{
LPSTR objName; HANDLE objHandle; CHAR objNameBuffer[MAX_OBJECT_NAME];
objName = PuDbgpBuildObjectName( objNameBuffer, FileName, LineNumber, MemberName, Address );
objHandle = CreateSemaphoreA( NULL, // lpSemaphoreAttributes
InitialCount, // lInitialCount
MaximumCount, // lMaximumCount
objName // lpName
);
if( objHandle != NULL ) { InterlockedIncrement( &g_PuDbgSemaphoresCreated ); }
return objHandle;
} // PuDbgCreateSemaphore
HANDLEPuDbgCreateMutex( IN LPSTR FileName, IN ULONG LineNumber, IN LPSTR MemberName, IN PVOID Address, IN BOOL InitialOwner )
/*++
Routine Description:
Creates a new mutex object.
Arguments:
FileName - The filename of the source creating the object. This is __FILE__ of the caller.
LineNumber - The line number within the source. This is __LINE__ of the caller.
MemberName - The member/global variable name where the object handle is to be stored.
Address - The address of the containing structure/class or of the global itself.
InitialOwner - TRUE if the mutex should be created "owned".
Return Value:
HANDLE - Handle to the object if successful, NULL otherwise.
--*/
{
LPSTR objName; HANDLE objHandle; CHAR objNameBuffer[MAX_OBJECT_NAME];
objName = PuDbgpBuildObjectName( objNameBuffer, FileName, LineNumber, MemberName, Address );
objHandle = CreateMutexA( NULL, // lpMutexAttributes
InitialOwner, // bInitialOwner,
objName // lpName
);
if( objHandle != NULL ) { InterlockedIncrement( &g_PuDbgMutexesCreated ); }
return objHandle;
} // PuDbgCreateMutex
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