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67 lines
2.2 KiB
67 lines
2.2 KiB
/* mdft.c -- run modal dialog from thread context (not). */
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/* Copyright 1995 Spyglass, Inc. All Rights Reserved. */
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/* Jeff Hostetler, Spyglass, Inc. 1995. */
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#include "all.h"
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#define STATE_MDFT_GOTSEMAPHORE (STATE_OTHER + 0)
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#define STATE_MDFT_RANDIALOG (STATE_OTHER + 1)
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int MDFT_RunModalDialog_Async(struct Mwin * tw, int nState, void **ppInfo)
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{
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struct Params_SemData * pSemData;
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/* must be called from a thread context */
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/* we have decided to not allow modal dialogs to be
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* started from a thread context (since the async
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* code is not reentrant). therefore, we block
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* our thread and request that the 'baby' window
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* run the dialog on our behalf when it gets a chance.
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*
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* but before anyone can put up a modal dialog, they
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* must obtain the ModalDialogSemaphore.
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*
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*/
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struct Params_mdft * pmdft = *ppInfo;
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XX_Assert((tw==pmdft->tw),("MDFT: tw not in sync."));
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switch (nState)
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{
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case STATE_INIT:
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XX_DMsg(DBG_SEM,("MDFT: RunModalDialog INIT [tw 0x%08lx]\n",tw));
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pSemData = GTR_CALLOC(1,sizeof(*pSemData));
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pSemData->pStatus = &pmdft->SemaphoreStatus;
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pSemData->semaphore = &gModalDialogSemaphore;
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WAIT_Push(tw,waitSameInteract,GTR_GetString(SID_INF_WAITING_ON_MODAL_DIALOG_SEMAPHORE));
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Async_DoCall(Sem_WaitSem_Async,pSemData);
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return STATE_MDFT_GOTSEMAPHORE;
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case STATE_MDFT_GOTSEMAPHORE:
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XX_DMsg(DBG_SEM,("MDFT: RunModalDialog GotSemaphore [tw 0x%08lx]\n",tw));
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if (pmdft->SemaphoreStatus != 1)
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{
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*pmdft->pStatus = -1;
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WAIT_Pop(tw);
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return STATE_DONE;
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}
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WAIT_Update(tw,waitSameInteract,pmdft->msg1);
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Async_BlockByWindow(tw);
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pmdft->tw = tw;
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PostMessage(wg.hWndHidden,WM_DO_RUN_MODAL_DIALOG,(WPARAM)0,(LPARAM)pmdft);
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return STATE_MDFT_RANDIALOG;
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case STATE_MDFT_RANDIALOG:
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XX_DMsg(DBG_SEM,("MDFT: RunModalDialog RanDialog [tw 0x%08lx]\n",tw));
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WAIT_Pop(tw);
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Sem_SignalSem_Sync(&gModalDialogSemaphore); /* release modal dialog semaphore */
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pmdft->SemaphoreStatus = 0;
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*pmdft->pStatus = 1;
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return STATE_DONE;
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}
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/*NOTREACHED*/
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}
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