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/*++
Copyright (c) 1991 Microsoft Corporation
Module Name:
dllque16.c
Abstract:
This module implements 32 equivalents of OS/2 V1.21 queues
API Calls. These are called from 16->32 thunks (i386\doscalls.asm).
Author:
Beni Lavi (BeniL) 25-Nov-1991
Revision History:
--*/
#define INCL_OS2V20_ERRORS
#define INCL_OS2V20_QUEUES
#include "os2dll.h"
#include "os2dll16.h"
typedef struct _REQUESTDATA16 {
PID16 pidProcess;
USHORT usEventCode;
} REQUESTDATA16, *PREQUESTDATA16;
APIRET
Dos16ReadQueue(
IN HQUEUE QueueHandle,
OUT PREQUESTDATA16 RequestInfo,
OUT PUSHORT pDataLength,
OUT PULONG Data,
IN ULONG ReadPosition,
IN BOOL32 NoWait,
OUT PBYTE ElementPriority,
IN HSEM SemHandle
)
{
APIRET rc;
REQUESTDATA lRequestInfo;
ULONG DataLogicalAddr;
POS21X_SEM pSem;
HSEM SemEvent;
BOOLEAN FirstTime;
ULONG DataLength;
try {
Od2ProbeForWrite(Data,sizeof(*Data),1);
Od2ProbeForWrite(pDataLength, sizeof(USHORT), 1);
} except( EXCEPTION_EXECUTE_HANDLER ) {
Od2ExitGP();
}
if (SemHandle != 0) {
pSem = Od2LookupOrCreateSem (SemHandle, &FirstTime, 0);
if (pSem == NULL) {
return(ERROR_INVALID_HANDLE);
}
SemEvent = pSem->Event;
}
else {
SemEvent = 0;
}
*pDataLength = (USHORT) DataLength;
rc = DosReadQueue(QueueHandle, &lRequestInfo, &DataLength, &DataLogicalAddr,
ReadPosition, NoWait, ElementPriority, SemEvent);
*pDataLength = (USHORT) DataLength;
RequestInfo->pidProcess = (USHORT)lRequestInfo.SenderProcessId;
RequestInfo->usEventCode = (USHORT)lRequestInfo.SenderData;
if (DataLength != 0) {
*Data = FLATTOFARPTR(DataLogicalAddr);
}
return rc;
}
APIRET
DosSemSet(
IN HSEM hsem
);
APIRET
Dos16PeekQueue(
IN HQUEUE QueueHandle,
OUT PREQUESTDATA16 RequestInfo,
OUT PUSHORT pDataLength,
OUT PULONG Data,
IN OUT PUSHORT pReadPosition,
IN BOOL32 NoWait,
OUT PBYTE ElementPriority,
IN HSEM SemHandle
)
{
APIRET rc;
REQUESTDATA lRequestInfo;
ULONG DataLogicalAddr;
POS21X_SEM pSem;
HSEM SemEvent;
BOOLEAN FirstTime;
ULONG DataLength;
ULONG ReadPosition;
try {
Od2ProbeForWrite(Data, sizeof(*Data), 1);
Od2ProbeForWrite(pDataLength, sizeof(USHORT), 1);
Od2ProbeForWrite(pReadPosition, sizeof(USHORT), 1);
} except( EXCEPTION_EXECUTE_HANDLER ) {
Od2ExitGP();
}
if (SemHandle != 0) {
//
// DosPeekQueue should set the semaphore (test case approves this) [YosefD Jul 4 1995]
//
DosSemSet(SemHandle);
pSem = Od2LookupOrCreateSem (SemHandle, &FirstTime, 0);
if (pSem == NULL) {
return(ERROR_INVALID_HANDLE);
}
if (pSem->FlagsByte) {
//
// This is system semaphore.
// Special hack that marks the semaphore. Semaphore APIs will know that this
// semaphore was used by DosPeekQueue. In the case that DosSemRequest will
// be called to wait on this semaphore we will call to DosSemWait.
//
pSem->FlagsByte |= SYSSEM_QUEUE;
}
SemEvent = pSem->Event;
}
else {
SemEvent = 0;
}
DataLength = (ULONG) *pDataLength;
ReadPosition = (ULONG) *pReadPosition;
rc = DosPeekQueue(QueueHandle, &lRequestInfo, &DataLength, &DataLogicalAddr,
&ReadPosition, NoWait, ElementPriority, SemEvent);
*pDataLength = (USHORT) DataLength;
*pReadPosition = (USHORT) ReadPosition;
RequestInfo->pidProcess = (USHORT)lRequestInfo.SenderProcessId;
RequestInfo->usEventCode = (USHORT)lRequestInfo.SenderData;
*Data = FLATTOFARPTR(DataLogicalAddr);
return rc;
}
APIRET
Dos16CreateQueue(
OUT PUSHORT pQueueHandle,
IN ULONG QueueType,
IN PSZ ObjectName
)
{
HQUEUE QueueHandle;
APIRET Rc;
try
{
Od2ProbeForWrite(pQueueHandle, sizeof(USHORT), 1);
} except( EXCEPTION_EXECUTE_HANDLER )
{
Od2ExitGP();
}
QueueHandle = (HQUEUE) *pQueueHandle;
Rc = DosCreateQueue(
&QueueHandle,
QueueType,
ObjectName
);
*pQueueHandle = (USHORT) QueueHandle;
return (Rc);
}
APIRET
Dos16OpenQueue(
OUT PUSHORT pOwnerProcessId,
OUT PUSHORT pQueueHandle,
IN PSZ ObjectName
)
{
PID OwnerProcessId;
HQUEUE QueueHandle;
APIRET Rc;
try
{
Od2ProbeForWrite(pOwnerProcessId, sizeof(USHORT), 1);
Od2ProbeForWrite(pQueueHandle, sizeof(USHORT), 1);
} except( EXCEPTION_EXECUTE_HANDLER )
{
Od2ExitGP();
}
OwnerProcessId = (PID) *pOwnerProcessId;
QueueHandle = (HQUEUE) *pQueueHandle;
Rc = DosOpenQueue(
&OwnerProcessId,
&QueueHandle,
ObjectName
);
*pOwnerProcessId = (USHORT) OwnerProcessId;
*pQueueHandle = (USHORT) QueueHandle;
return (Rc);
}
APIRET
Dos16QueryQueue(
OUT HQUEUE QueueHandle,
OUT PUSHORT pCountQueueElements
)
{
ULONG CountQueueElements;
APIRET Rc;
try
{
Od2ProbeForWrite(pCountQueueElements, sizeof(USHORT), 1);
} except( EXCEPTION_EXECUTE_HANDLER )
{
Od2ExitGP();
}
CountQueueElements = (ULONG) *pCountQueueElements;
Rc = DosQueryQueue(
QueueHandle,
&CountQueueElements
);
*pCountQueueElements = (USHORT) CountQueueElements;
return (Rc);
}
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