717 lines
18 KiB
C
717 lines
18 KiB
C
/***************************************************************************
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* Copyright 1995, Technion, Israel Institute of Technology
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* Electrical Eng, Software Lab.
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* Author: Michael Veksler.
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***************************************************************************
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* File: dde_proc.c
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* Purpose : DDE signals and processes functionality for DDE
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***************************************************************************
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*/
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#ifdef CONFIG_IPC
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#if defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__)
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#define msgbuf mymsg
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#endif
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#include <sys/time.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include <signal.h>
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#include <errno.h>
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#include <sys/msg.h>
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#include "wintypes.h"
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#include "win.h"
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#include "shm_semaph.h"
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#include "shm_main_blk.h"
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#include "dde_proc.h"
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#include "dde_mem.h"
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#include "dde.h"
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#include "debug.h"
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#include "xmalloc.h"
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int curr_proc_idx= -1;
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enum stop_wait_op stop_wait_op=CONT;
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int had_SIGUSR2 = 0;
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sigjmp_buf env_get_ack;
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sigjmp_buf env_wait_x;
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#define IDX_TO_HWND(idx) (0xfffe - (idx))
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#define HWND_TO_IDX(wnd) (0xfffe - (wnd))
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#define DDE_WIN_INFO(win) ( main_block->windows[HWND_TO_IDX(win)] )
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#define DDE_WIN2PROC(win) ( DDE_WIN_INFO(win).proc_idx )
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#define DDE_IsRemoteWindow(win) ( (win)<0xffff && (win)>=(0xffff-DDE_PROCS))
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#define DDE_SEND 1
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#define DDE_POST 2
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#define DDE_ACK 3
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#define DDE_MSG_SIZE sizeof(MSG16)
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#define FREE_WND (WORD)(-2)
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#define DELETED_WND (WORD)(-3)
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static char *msg_type[4]={"********", "DDE_SEND", "DDE_POST", "DDE_ACK"};
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struct msg_dat {
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struct msgbuf dat;
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char filler[DDE_MSG_SIZE];
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} ;
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typedef struct fifo_element {
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int value;
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struct fifo_element *next;
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} fifo_element;
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struct fifo {
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fifo_element *first; /* first element in the fifo or NULL */
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fifo_element *last; /* last element in the fifo or NULL */
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};
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static struct fifo fifo = {NULL,NULL};
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void dde_proc_delete(int proc_idx);
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void dde_proc_add_fifo(int val)
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{
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fifo_element *created;
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created= (fifo_element*) xmalloc( sizeof(fifo_element) );
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created->value = val;
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created->next = NULL;
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if (fifo.first==NULL)
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fifo.first= created;
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else
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fifo.last->next= created;
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fifo.last = created;
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}
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/* get an item from the fifo, and return it.
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* If fifo is empty, return -1
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*/
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int dde_proc_shift_fifo()
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{
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int val;
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fifo_element *deleted;
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if (fifo.first == NULL)
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return -1;
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deleted= fifo.first;
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val= deleted->value;
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fifo.first= deleted->next;
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if (fifo.first == NULL)
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fifo.last= NULL;
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free(deleted);
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return val;
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}
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static void print_dde_message(char *desc, MSG16 *msg);
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/* This should be run only when main_block is first allocated. */
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void dde_proc_init(dde_proc proc)
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{
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int proc_num;
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for (proc_num=0 ; proc_num<DDE_PROCS ; proc_num++, proc++) {
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proc->msg=-1;
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proc->sem=-1;
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proc->shmid=-1;
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proc->pid=-1;
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}
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}
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/* add current process to the list of processes */
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void dde_proc_add(dde_proc procs)
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{
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dde_proc proc;
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int proc_idx;
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TRACE(dde,"(..)\n");
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shm_write_wait(main_block->sem);
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/* find free proc_idx and allocate it */
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for (proc_idx=0, proc=procs ; proc_idx<DDE_PROCS ; proc_idx++, proc++)
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if (proc->pid==-1)
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break; /* found! */
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if (proc_idx<DDE_PROCS) { /* got here beacuse a free was found ? */
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dde_msg_setup(&proc->msg);
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proc->pid=getpid();
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curr_proc_idx=proc_idx;
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shm_sem_init(&proc->sem);
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}
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else {
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fflush(stdout);
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WARN(dde,"Can't allocate process\n");
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}
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shm_write_signal(main_block->sem);
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}
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/* wait for dde - acknowledge message - or timout */
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static BOOL32 get_ack()
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{
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struct timeval timeout;
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int size;
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struct msg_dat ack_buff;
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/* timeout after exactly one seconf */
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timeout.tv_sec = 1;
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timeout.tv_usec = 0;
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sigsetjmp(env_get_ack, 1);
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/* get here after normal execution, or after siglongjmp */
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do { /* loop to wait for DDE_ACK */
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had_SIGUSR2=0;
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stop_wait_op=CONT; /* sensitive code: disallow siglongjmp */
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size= msgrcv( main_block->proc[curr_proc_idx].msg , &ack_buff.dat,
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1, DDE_ACK, IPC_NOWAIT);
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if (size>=0) {
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TRACE(msg,"get_ack: received DDE_ACK message\n");
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return TRUE;
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}
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if (DDE_GetRemoteMessage()) {
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had_SIGUSR2=1; /* might have recieved SIGUSR2 */
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}
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stop_wait_op=STOP_WAIT_ACK; /* allow siglongjmp */
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} while (had_SIGUSR2); /* loop if SIGUSR2 was recieved */
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/* siglongjmp should be enabled at this moment */
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select( 0, NULL, NULL, NULL, &timeout );
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stop_wait_op=CONT; /* disallow further siglongjmp */
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/* timeout !! (otherwise there would have been a siglongjmp) */
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return FALSE;
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}
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/* Transfer one message to a given process */
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static BOOL32 DDE_DoOneMessage (int proc_idx, int size, struct msgbuf *msgbuf)
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{
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dde_proc proc= &main_block->proc[ proc_idx ];
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if (proc_idx == curr_proc_idx)
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return FALSE;
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if (kill(proc->pid,0) < 0) {
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/* pid does not exist, or not our */
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dde_proc_delete(proc_idx);
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return FALSE;
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}
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if (TRACE_ON(dde) || WARN_ON_dde) {
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MSG16 *msg=(MSG16*) &msgbuf->mtext;
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char *title;
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if (msgbuf->mtype==DDE_SEND)
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title="sending dde:";
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else if (msgbuf->mtype==DDE_POST)
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title="posting dde:";
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else
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title=NULL;
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if (title)
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print_dde_message(title, msg);
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else
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WARN(dde, "Unknown message type=0x%lx\n", msgbuf->mtype);
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}
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TRACE(msg, "to proc_idx=%d (pid=%d), queue=%u\n",
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proc_idx, proc->pid, (unsigned)proc->msg);
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if ( proc->msg != -1) {
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TRACE(msg, "doing...(type=%s)\n", msg_type[msgbuf->mtype]);
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size=msgsnd (proc->msg, msgbuf, size, 0);
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if (size<0) {
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fflush(stdout);
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perror("msgsnd");
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}
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kill(proc->pid,SIGUSR2); /* tell the process there is a message */
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TRACE(msg, "Trying to get acknowledgment from msg queue=%d\n",
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proc->msg);
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Yield16(); /* force task switch, and */
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/* acknowledgment sending */
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if (get_ack()) {
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return TRUE;
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} else {
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fflush(stdout);
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WARN(dde,"get_ack: DDE_DoOneMessage: timeout\n");
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return FALSE;
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}
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}
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else {
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WARN(msg, "message not sent, target has no message queue\n");
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return FALSE;
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}
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}
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/* Do some sort of premitive hash table */
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static HWND16 HWND_Local2Remote(HWND16 orig)
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{
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int dde_wnd_idx;
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int deleted_idx= -1;
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WND_DATA *tested;
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WND_DATA *deleted= NULL;
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int i;
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dde_wnd_idx= orig % DDE_WINDOWS;
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for ( i=0 ; i < DDE_WINDOWS ; i++, dde_wnd_idx++) {
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if (dde_wnd_idx >= DDE_WINDOWS)
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dde_wnd_idx -= DDE_WINDOWS; /* wrap-around */
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tested= &main_block->windows[ dde_wnd_idx ];
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if (tested->proc_idx == FREE_WND)
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break;
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if (deleted == NULL && tested->proc_idx == DELETED_WND) {
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deleted= tested;
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deleted_idx= dde_wnd_idx;
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} else if (tested->wnd == orig && tested->proc_idx == curr_proc_idx) {
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return IDX_TO_HWND(dde_wnd_idx);
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}
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}
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if (deleted != NULL) { /* deleted is preferable */
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/* free item, allocate it */
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deleted->proc_idx= curr_proc_idx;
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deleted->wnd = orig;
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return IDX_TO_HWND(deleted_idx);
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}
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if (tested->proc_idx == FREE_WND) {
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tested->proc_idx= curr_proc_idx;
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tested->wnd = orig;
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return IDX_TO_HWND(dde_wnd_idx);
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}
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WARN(dde, "Can't map any more windows to DDE windows\n");
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return 0;
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}
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static BOOL32 DDE_DoMessage( MSG16 *msg, int type )
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{
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int proc_idx;
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MSG16 *remote_message;
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struct msg_dat msg_dat;
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BOOL32 success;
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if (msg->wParam == 0)
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return FALSE;
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if (main_block==NULL) {
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if (msg->message >= WM_DDE_FIRST && msg->message <= WM_DDE_LAST)
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DDE_IPC_init();
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else
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return FALSE;
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}
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if (msg->wParam == (HWND16)-1)
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return FALSE;
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if ( ! DDE_IsRemoteWindow(msg->hwnd) && msg->hwnd!= (HWND16)-1)
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return FALSE;
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TRACE(msg, "(hwnd=0x%x,msg=0x%x,..) - %s\n",
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(int)msg->hwnd,(int)msg->message,msg_type[type]);
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TRACE(msg, "(hwnd=0x%x,msg=0x%x,..) -- HWND_BROADCAST !\n",
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(int)msg->hwnd,(int)msg->message);
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remote_message=(void*)&msg_dat.dat.mtext;
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memcpy(remote_message, msg, sizeof(*msg));
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remote_message->wParam= HWND_Local2Remote(msg->wParam);
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if (remote_message->wParam == 0)
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return FALSE;
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msg_dat.dat.mtype=type;
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if (msg->hwnd == (HWND16)-1) {
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success= FALSE;
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for ( proc_idx=0; proc_idx < DDE_PROCS ; proc_idx++) {
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if (proc_idx == curr_proc_idx)
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continue;
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if (main_block->proc[ proc_idx ].msg != -1)
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success|=DDE_DoOneMessage(proc_idx, DDE_MSG_SIZE, &msg_dat.dat);
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}
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return success;
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} else {
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return DDE_DoOneMessage(DDE_WIN2PROC(msg->hwnd), DDE_MSG_SIZE,
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&msg_dat.dat);
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}
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}
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BOOL32 DDE_SendMessage( MSG16 *msg)
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{
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return DDE_DoMessage(msg, DDE_SEND);
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}
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BOOL32 DDE_PostMessage( MSG16 *msg)
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{
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return DDE_DoMessage(msg, DDE_POST);
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}
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void dde_proc_send_ack(HWND16 wnd, BOOL32 val) {
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int proc,msg;
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static struct msgbuf msg_ack={DDE_ACK,{'0'}};
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proc=DDE_WIN2PROC(wnd);
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msg=main_block->proc[proc].msg;
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TRACE(msg,"sending ACK to wnd=%4x, proc=%d,msg=%d, pid=%d\n",
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wnd,proc,msg,main_block->proc[proc].pid);
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msg_ack.mtext[0]=val;
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msgsnd (msg, &msg_ack, 1, 0);
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kill(main_block->proc[proc].pid, SIGUSR2);
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}
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/* return true (non zero) if had a remote message */
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#undef DDE_GetRemoteMessage
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int DDE_GetRemoteMessage()
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{
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static int nesting=0; /* to avoid infinite recursion */
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MSG16 *remote_message;
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int size;
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struct msg_dat msg_dat;
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BOOL32 was_sent; /* sent/received */
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BOOL32 passed;
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WND *wndPtr;
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if (curr_proc_idx==-1) /* do we have DDE initialized ? */
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return 0;
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if (nesting>10) {
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fflush(stdout);
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ERR(msg, "suspecting infinite recursion, exiting");
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return 0;
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}
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remote_message=(void*)&msg_dat.dat.mtext;
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/* test for SendMessage */
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size= msgrcv( main_block->proc[curr_proc_idx].msg , &msg_dat.dat,
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DDE_MSG_SIZE, DDE_SEND, IPC_NOWAIT);
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if (size==DDE_MSG_SIZE) { /* is this a correct message (if any) ?*/
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was_sent=TRUE;
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TRACE(msg, "DDE:receive sent message. msg=%04x wPar=%04x"
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" lPar=%08lx\n",
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remote_message->message, remote_message->wParam,
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remote_message->lParam);
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} else {
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size= msgrcv( main_block->proc[curr_proc_idx].msg , &msg_dat.dat,
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DDE_MSG_SIZE, DDE_POST, IPC_NOWAIT);
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if (size==DDE_MSG_SIZE) { /* is this a correct message (if any) ?*/
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was_sent=FALSE;
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TRACE(msg, "DDE:receive posted message. "
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"msg=%04x wPar=%04x lPar=%08lx\n",
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remote_message->message, remote_message->wParam,
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remote_message->lParam);
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}
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else
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return 0; /* no DDE message found */
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}
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/* At this point we are sure that there is a DDE message,
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* was_sent is TRUE is the message was sent, and false if it was posted
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*/
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nesting++;
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if (TRACE_ON(dde)) {
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char *title;
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if (was_sent)
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title="receive sent dde:";
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else
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title="receive posted dde:";
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print_dde_message(title, remote_message);
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}
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if (remote_message->hwnd != (HWND16) -1 ) {
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HWND16 dde_window= DDE_WIN_INFO(remote_message->hwnd).wnd;
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/* we should know exactly where to send the message (locally)*/
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if (was_sent) {
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TRACE(dde, "SendMessage(wnd=0x%04x, msg=0x%04x, wPar=0x%04x,"
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"lPar=0x%08x\n", dde_window, remote_message->message,
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remote_message->wParam, (int)remote_message->lParam);
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/* execute the recieved message */
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passed= SendMessage16(dde_window, remote_message->message,
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remote_message->wParam, remote_message->lParam);
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/* Tell the sended, that the message is here */
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dde_proc_send_ack(remote_message->wParam, passed);
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}
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else {
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passed= PostMessage16(dde_window, remote_message->message,
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remote_message->wParam, remote_message->lParam);
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if (passed == FALSE) {
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/* Tell the sender, that the message is here, and failed */
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dde_proc_send_ack(remote_message->wParam, FALSE);
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}
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else {
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/* ack will be sent later, at the first peek/get message */
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dde_proc_add_fifo(remote_message->wParam);
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}
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}
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nesting--;
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return 1;
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}
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/* iterate through all the windows */
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for (wndPtr = WIN_FindWndPtr(GetTopWindow32(GetDesktopWindow32()));
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wndPtr != NULL;
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wndPtr = wndPtr->next)
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{
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if (wndPtr->dwStyle & WS_POPUP || wndPtr->dwStyle & WS_CAPTION) {
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if (was_sent)
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SendMessage16( wndPtr->hwndSelf, remote_message->message,
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remote_message->wParam, remote_message->lParam );
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else
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PostMessage16( wndPtr->hwndSelf, remote_message->message,
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remote_message->wParam, remote_message->lParam );
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} /* if */
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} /* for */
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/* replay with DDE_ACK after broadcasting in DDE_GetRemoteMessage */
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dde_proc_send_ack(remote_message->wParam, TRUE);
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nesting--;
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return 1;
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}
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int dde_reschedule()
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{
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int ack_wnd;
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ack_wnd= dde_proc_shift_fifo();
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if (ack_wnd != -1) {
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dde_proc_send_ack(ack_wnd, TRUE);
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usleep(10000); /* force unix task switch */
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return 1;
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}
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return 0;
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}
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void dde_msg_setup(int *msg_ptr)
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{
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*msg_ptr= msgget (IPC_PRIVATE, IPC_CREAT | 0700);
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if (*msg_ptr==-1)
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perror("dde_msg_setup fails to get message queue");
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}
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/* do we have dde handling in the window ?
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* If we have, atom usage will make this instance of wine set up
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* it's IPC stuff.
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*/
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void DDE_TestDDE(HWND16 hwnd)
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{
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static in_test = 0;
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if (in_test++) return;
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if (main_block != NULL) {
|
|
in_test--;
|
|
return;
|
|
}
|
|
TRACE(msg,"(0x%04x)\n", hwnd);
|
|
if (hwnd==0)
|
|
hwnd=-1;
|
|
/* just send a message to see how things are going */
|
|
SendMessage16( hwnd, WM_DDE_INITIATE, 0, 0);
|
|
in_test--;
|
|
}
|
|
|
|
void dde_proc_delete(int proc_idx)
|
|
{
|
|
dde_proc_done(&main_block->proc[proc_idx]);
|
|
}
|
|
void stop_wait(int a)
|
|
{
|
|
|
|
had_SIGUSR2=1;
|
|
switch(stop_wait_op) {
|
|
case STOP_WAIT_ACK:
|
|
siglongjmp(env_get_ack,1);
|
|
break; /* never reached */
|
|
case STOP_WAIT_X:
|
|
siglongjmp(env_wait_x,1);
|
|
break; /* never reached */
|
|
case CONT:
|
|
/* do nothing */
|
|
}
|
|
}
|
|
|
|
static void print_dde_message(char *desc, MSG16 *msg)
|
|
{
|
|
/* extern const char *MessageTypeNames[];*/
|
|
extern int debug_last_handle_size;
|
|
WORD wStatus,hWord;
|
|
void *ptr;
|
|
DDEACK *ddeack;
|
|
DDEADVISE *ddeadvise;
|
|
DDEDATA *ddedata;
|
|
DDEPOKE *ddepoke;
|
|
dbg_decl_str(dde, 2048);
|
|
|
|
if (is_dde_handle(msg->lParam & 0xffff) )
|
|
ptr=DDE_AttachHandle(msg->lParam&0xffff, NULL);
|
|
else
|
|
ptr =NULL;
|
|
wStatus=LOWORD(msg->lParam);
|
|
hWord=HIWORD(msg->lParam);
|
|
|
|
dsprintf(dde,"%s", desc);
|
|
dsprintf(dde,"%04x %04x==%s %04x %08lx ",
|
|
msg->hwnd, msg->message,"",/*MessageTypeNames[msg->message],*/
|
|
msg->wParam, msg->lParam);
|
|
switch(msg->message) {
|
|
case WM_DDE_INITIATE:
|
|
case WM_DDE_REQUEST:
|
|
case WM_DDE_EXECUTE:
|
|
case WM_DDE_TERMINATE:
|
|
/* nothing to do */
|
|
break;
|
|
case WM_DDE_ADVISE:
|
|
/* DDEADVISE: hOptions in WM_DDE_ADVISE message */
|
|
if (ptr) {
|
|
ddeadvise=ptr;
|
|
dsprintf(dde,"fDeferUpd=%d,fAckReq=%d,cfFormat=0x%x",
|
|
ddeadvise->fDeferUpd, ddeadvise->fAckReq,
|
|
ddeadvise->cfFormat);
|
|
} else
|
|
dsprintf(dde,"NO-DATA");
|
|
dsprintf(dde," atom=0x%x",hWord);
|
|
break;
|
|
|
|
case WM_DDE_UNADVISE:
|
|
dsprintf(dde,"format=0x%x, atom=0x%x",wStatus,hWord);
|
|
break;
|
|
case WM_DDE_ACK:
|
|
ddeack=(DDEACK*)&wStatus;
|
|
dsprintf(dde,"bAppReturnCode=%d,fBusy=%d,fAck=%d",
|
|
ddeack->bAppReturnCode, ddeack->fBusy, ddeack->fAck);
|
|
if (ddeack->fAck)
|
|
dsprintf(dde,"(True)");
|
|
else
|
|
dsprintf(dde,"(False)");
|
|
break;
|
|
|
|
case WM_DDE_DATA:
|
|
if (ptr) {
|
|
ddedata=ptr;
|
|
dsprintf(dde,"fResponse=%d,fRelease=%d,"
|
|
"fAckReq=%d,cfFormat=0x%x,value=\"%.*s\"",
|
|
ddedata->fResponse, ddedata->fRelease,
|
|
ddedata->fAckReq, ddedata->cfFormat,
|
|
debug_last_handle_size- (int)sizeof(*ddedata)+1,
|
|
ddedata->Value);
|
|
} else
|
|
dsprintf(dde,"NO-DATA");
|
|
dsprintf(dde," atom=0x%04x",hWord);
|
|
break;
|
|
|
|
case WM_DDE_POKE:
|
|
if (ptr) {
|
|
ddepoke=ptr;
|
|
dsprintf(dde,"fRelease=%d,cfFormat=0x%x,value[0]='%c'",
|
|
ddepoke->fRelease, ddepoke->cfFormat, ddepoke->Value[0]);
|
|
} else
|
|
dsprintf(dde,"NO-DATA");
|
|
dsprintf(dde," atom=0x%04x",hWord);
|
|
break;
|
|
}
|
|
TRACE(dde,"%s\n", dbg_str(dde));
|
|
}
|
|
|
|
void dde_proc_done(dde_proc proc)
|
|
{
|
|
if (proc->msg != -1)
|
|
msgctl(proc->msg, IPC_RMID, NULL);
|
|
proc->msg=-1;
|
|
proc->pid=-1;
|
|
shm_delete_chain(&proc->shmid);
|
|
shm_sem_done(&proc->sem);
|
|
}
|
|
|
|
/* delete entry, if old junk */
|
|
void dde_proc_refresh(dde_proc proc)
|
|
{
|
|
if (proc->pid == -1)
|
|
return;
|
|
|
|
if (kill(proc->pid, 0) != -1)
|
|
return;
|
|
|
|
/* get here if entry non empty, and the process does not exist */
|
|
dde_proc_done(proc);
|
|
}
|
|
|
|
void dde_wnd_setup()
|
|
{
|
|
int i;
|
|
|
|
for (i=0 ; i < DDE_WINDOWS ; i++)
|
|
main_block->windows[i].proc_idx = FREE_WND;
|
|
}
|
|
|
|
static BOOL32 DDE_ProcHasWindows(int proc_idx)
|
|
{
|
|
WND_DATA *tested;
|
|
int i;
|
|
|
|
for ( i=0 ; i < DDE_WINDOWS ; i++) {
|
|
tested= &main_block->windows[ i ];
|
|
|
|
if (tested->proc_idx == proc_idx)
|
|
return TRUE;
|
|
}
|
|
return FALSE;
|
|
}
|
|
/* Look for hwnd in the hash table of DDE windows,
|
|
* Delete it from there. If there are no more windows for this
|
|
* process, remove the process from the DDE data-structure.
|
|
* If there are no more processes - delete the whole DDE struff.
|
|
*
|
|
* This is inefficient, but who cares for the efficiency of this rare
|
|
* operation...
|
|
*/
|
|
void DDE_DestroyWindow(HWND16 hwnd)
|
|
{
|
|
int dde_wnd_idx;
|
|
WND_DATA *tested;
|
|
int i;
|
|
|
|
if (main_block == NULL)
|
|
return;
|
|
|
|
dde_wnd_idx= hwnd % DDE_WINDOWS;
|
|
|
|
for ( i=0 ; i < DDE_WINDOWS ; i++, dde_wnd_idx++) {
|
|
if (dde_wnd_idx >= DDE_WINDOWS)
|
|
dde_wnd_idx -= DDE_WINDOWS; /* wrap-around */
|
|
|
|
tested= &main_block->windows[ dde_wnd_idx ];
|
|
if (tested->proc_idx == FREE_WND)
|
|
return; /* No window will get deleted here */
|
|
|
|
if (tested->wnd == hwnd && tested->proc_idx == curr_proc_idx) {
|
|
dde_reschedule();
|
|
tested->proc_idx= DELETED_WND;
|
|
if (DDE_ProcHasWindows( curr_proc_idx ))
|
|
return;
|
|
while (dde_reschedule()) /* make sure there are no other */
|
|
/* processes waiting for acknowledgment */
|
|
;
|
|
dde_proc_delete( curr_proc_idx );
|
|
if (DDE_no_of_attached() == 1)
|
|
shm_delete_all(-1);
|
|
else {
|
|
shmdt( (void *) main_block);
|
|
main_block= NULL;
|
|
}
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
|
|
#endif /* CONFIG_IPC */
|