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285 lines
7.9 KiB
285 lines
7.9 KiB
//+-------------------------------------------------------------------------
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//
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// Microsoft Windows
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// Copyright (C) Microsoft Corporation, 1992 - 1993.
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//
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// File: ETASK.CXX (16 bit target)
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//
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// Contents: ETask management code, taken from 16-bit COMPOBJ.CPP
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//
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// Functions:
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//
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// History: 08-Mar-94 BobDay Copied parts from \\ole\slm\...\compobj.cpp
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// 01-Feb-95 JohannP modified/simplified
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//
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//--------------------------------------------------------------------------
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#include <headers.cxx>
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#pragma hdrstop
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#include <ole2sp.h>
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#include <olecoll.h>
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#include <map_kv.h>
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#include "comlocal.hxx"
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#include "map_htsk.h"
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#include "etask.hxx"
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#include "call32.hxx"
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#include "apilist.hxx"
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// NOTE: NEAR forces this variable to be in the default data segment; without
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// NEAR, the ambient model of the class CMapHandleEtask, which is FAR,
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// causes the variable to be in a far_data segment.
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//
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HTASK v_hTaskCache = NULL;
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Etask NEAR v_etaskCache;
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// quick check that the etask is valid (e.g., pointers are valid)
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INTERNAL_(BOOL) IsValidEtask(HTASK hTask, Etask FAR& etask)
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{
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Assert(GetCurrentProcess() == hTask);
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thkDebugOut((DEB_DLLS16, "IsValidEtask (%X) pMalloc(%p)\n", hTask, etask.m_pMalloc));
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if (!IsValidInterface(etask.m_pMalloc))
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{
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thkDebugOut((DEB_DLLS16, "IsValidEtask (%X) FALSE\n", hTask));
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return FALSE;
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}
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// FUTURE: verify that stack segment is the same
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// FUTURE: verify that hInst/hMod are the same
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thkDebugOut((DEB_DLLS16, "IsValidEtask (%X) TRUE\n", hTask));
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return TRUE;
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}
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// if task map empty, clear globals in case lib doesn't get unloaded
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INTERNAL_(void) CheckIfMapEmpty(void)
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{
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// if no more entries, clear v_pMallocShared; this ensures we clear the
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// variable if the app holds onto this pointer erroneously.
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if (v_mapToEtask.IsEmpty()) {
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v_pMallocShared = NULL;
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}
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}
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//+---------------------------------------------------------------------------
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//
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// Method: LookupEtask
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//
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// Synopsis: get etask for current task (and also return hTask);
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// does not create if none
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//
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// Arguments: [hTask] --
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// [etask] --
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//
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// Returns:
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//
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// History: Ole16 created for CompObj 16 bit for Ole2
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// 2-03-95 JohannP (Johann Posch) modified/simplified
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//
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// Notes:
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//
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//----------------------------------------------------------------------------
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STDAPI_(BOOL) LookupEtask(HTASK FAR& hTask, Etask FAR& etask)
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{
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hTask = GetCurrentProcess();
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thkDebugOut((DEB_DLLS16, "LookupEtask on Process (%X) \n", hTask));
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if (hTask == v_hTaskCache)
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{
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thkDebugOut((DEB_DLLS16, "LookupEtask found in cache (%X) \n", hTask));
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etask = v_etaskCache;
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goto CheckEtask;
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}
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if (!v_mapToEtask.Lookup(hTask, etask))
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{
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thkDebugOut((DEB_DLLS16, "LookupEtask faild on lookup (%X) \n", hTask));
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return FALSE;
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}
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else
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{
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thkDebugOut((DEB_DLLS16, "LookupEtask found in lookup (%X) \n", hTask));
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}
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// found etask; make this the current cache
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v_hTaskCache = hTask;
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v_etaskCache = etask;
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CheckEtask:
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if (IsValidEtask(hTask, etask))
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{
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return TRUE;
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}
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else
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{
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// task got reused; kill cache and entry in map
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v_hTaskCache = NULL;
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v_mapToEtask.RemoveKey(hTask);
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CheckIfMapEmpty();
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thkAssert(0 && "LookupEtask - failed (invalid Etask)");
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return FALSE;
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}
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}
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//+---------------------------------------------------------------------------
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//
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// Method: SetEtask
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//
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// Synopsis: set etask for task given (must be current task); return FALSE
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// if OOM (only first time; all other times should return TRUE).
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//
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// Arguments: [hTask] --
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// [etask] --
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//
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// Returns:
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//
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// History: Ole16 created for CompObj 16 bit for Ole2
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// 02-03-95 JohannP (Johann Posch) modified/simplified
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//
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// Notes:
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//
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//----------------------------------------------------------------------------
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STDAPI_(BOOL) SetEtask(HTASK hTask, Etask FAR& etask)
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{
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Assert(GetCurrentProcess() == hTask);
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if (!v_mapToEtask.SetAt(hTask, etask))
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return FALSE;
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Assert(IsValidEtask(hTask, etask));
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// map set; make this the current cache
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v_hTaskCache = hTask;
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v_etaskCache = etask;
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return TRUE;
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}
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//+---------------------------------------------------------------------------
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//
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// Method: ReleaseEtask
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//
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// Synopsis: release all fields in the etask; do all the task memory
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// (except the task allocator) first; then all the shared
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// memory (except the shared allocator); then the shared
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// allocator and finally the task allocator.
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// Also removes key if htask is given.
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//
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// Arguments: [htask] --
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// [etask] --
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//
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// Returns:
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//
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// History: Ole16 created for CompObj 16 bit for Ole2
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// 2-03-95 JohannP (Johann Posch) modified/simplified
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//
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// Notes: Called by daytona and chicago.
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//
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//----------------------------------------------------------------------------
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void ReleaseEtask(HTASK htask, Etask FAR& etask)
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{
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thkDebugOut((DEB_DLLS16, "ReleaseEtask on Process (%X) \n", htask));
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Assert(etask.m_inits == 1);
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Assert(etask.m_oleinits == 0);
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Assert(etask.m_reserved == 0);
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// Release any state that may have been set
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if (etask.m_punkState != NULL && IsValidInterface(etask.m_punkState))
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{
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etask.m_punkState->Release();
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}
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// first delete all task memory items
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delete etask.m_pDlls; // task memory
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delete etask.m_pMapToServerCO; // task memory
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delete etask.m_pMapToHandlerCO; // task memory
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delete etask.m_pArraySH; // task memory
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Assert(etask.m_pCThrd == NULL); // task memory; must be gone by now
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// remove key now that all task memory that will be freed is freed
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if (htask != NULL) {
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v_mapToEtask.RemoveKey(htask);
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}
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// if no more entries, remove last remaining memory; this prevents
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// problems if the dll is not unloaded for some reason before being
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// used again.
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if (v_mapToEtask.IsEmpty())
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v_mapToEtask.RemoveAll();
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// now remove all shared memory (doesn't need access to task pMalloc)
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Assert(etask.m_pMallocShared != NULL);
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if (etask.m_pMallocShared->Release() == 0) { // in shared memory
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// last use of the shared allocator; set global to null
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v_pMallocShared = NULL;
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Assert(v_mapToEtask.IsEmpty());
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}
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CheckIfMapEmpty();
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// finally, release the task memory
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Assert(etask.m_pMalloc != NULL);
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etask.m_pMalloc->Release(); // in task memory
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etask.m_pMalloc = NULL;
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thkDebugOut((DEB_DLLS16, "ReleaseEtask (%X) pMalloc(%p)\n", htask, etask.m_pMalloc));
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// invalidate cache
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v_hTaskCache = NULL;
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thkDebugOut((DEB_DLLS16, "ReleaseEtask done on (%X) \n", htask));
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}
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//+---------------------------------------------------------------------------
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//
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// Function: RemoveEtask
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//
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// Synopsis: Releases the shares allocator and removes
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// the etask from the global list
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//
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// Arguments: [hTask] -- htask
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// [etask] -- etask
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//
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// Returns:
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//
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// History: 2-03-95 JohannP (Johann Posch) Created
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//
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// Notes: Called only by Chicago.
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//
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//----------------------------------------------------------------------------
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STDAPI_(BOOL) RemoveEtask(HTASK FAR& hTask, Etask FAR& etask)
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{
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hTask = GetCurrentProcess();
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thkDebugOut((DEB_DLLS16, "RemoveEtask on Process (%X) \n", hTask));
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if (hTask == v_hTaskCache)
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{
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v_hTaskCache = NULL;
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}
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v_mapToEtask.RemoveKey(hTask);
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if (v_mapToEtask.IsEmpty())
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v_mapToEtask.RemoveAll();
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thkAssert(etask.m_pMallocShared != NULL);
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if(etask.m_pMallocShared->Release() == 0)
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{
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// in shared memory
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// last use of the shared allocator; set global to null
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v_pMallocShared = NULL;
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thkDebugOut((DEB_DLLS16, "RemoveEtask Set v_pMallocShared to NULL (%X) \n", hTask));
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Assert(v_mapToEtask.IsEmpty());
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}
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CheckIfMapEmpty();
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thkDebugOut((DEB_DLLS16, "RemoveEtask done (%X) \n", hTask));
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return TRUE;
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}
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