diff options
Diffstat (limited to 'nx-X11/programs/Xserver/hw/xnest/os2Stub.c')
| -rw-r--r-- | nx-X11/programs/Xserver/hw/xnest/os2Stub.c | 388 |
1 files changed, 388 insertions, 0 deletions
diff --git a/nx-X11/programs/Xserver/hw/xnest/os2Stub.c b/nx-X11/programs/Xserver/hw/xnest/os2Stub.c new file mode 100644 index 000000000..0868b4480 --- /dev/null +++ b/nx-X11/programs/Xserver/hw/xnest/os2Stub.c @@ -0,0 +1,388 @@ +/* + * (c) Copyright 1996 by Sebastien Marineau + * <marineau@genie.uottawa.ca> + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * HOLGER VEIT BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, + * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF + * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + * + * Except as contained in this notice, the name of Sebastien Marineau shall not be + * used in advertising or otherwise to promote the sale, use or other dealings + * in this Software without prior written authorization from Sebastien Marineau. + * + */ + +/* $XFree86: xc/programs/Xserver/hw/xnest/os2Stub.c,v 3.1 2002/05/31 18:46:04 dawes Exp $ */ + +/* This below implements select() for calls in xnest. It has been */ +/* somewhat optimized for improved performance, but assumes a few */ +/* things so it cannot be used as a general select. */ + +#define I_NEED_OS2_H +#include <X11/Xpoll.h> +#include <stdio.h> +#include <sys/select.h> +#include <sys/errno.h> +#include <sys/time.h> +#define INCL_DOSSEMAPHORES +#define INCL_DOSNPIPES +#define INCL_DOSMISC +#define INCL_DOSMODULEMGR +#undef BOOL +#undef BYTE +#include <os2.h> + +HEV hPipeSem; +HMODULE hmod_so32dll; +static int (*os2_tcp_select)(int*,int,int,int,long); +ULONG os2_get_sys_millis(); +extern int _files[]; + +#define MAX_TCP 256 +/* These lifted from sys/emx.h. Change if that changes there! */ +#define F_SOCKET 0x10000000 +#define F_PIPE 0x20000000 + +struct select_data +{ + fd_set read_copy; + fd_set write_copy; + BOOL have_read; + BOOL have_write; + int tcp_select_mask[MAX_TCP]; + int tcp_emx_handles[MAX_TCP]; + int tcp_select_copy[MAX_TCP]; + int socket_nread; + int socket_nwrite; + int socket_ntotal; + int pipe_ntotal; + int pipe_have_write; + int max_fds; +}; + +int os2PseudoSelect(int nfds, fd_set *readfds, fd_set *writefds, + fd_set *exceptfds, struct timeval *timeout) +{ +static BOOL FirstTime=TRUE; +static haveTCPIP=TRUE; +ULONG timeout_ms; +ULONG postCount, start_millis,now_millis; +char faildata[16]; +struct select_data sd; +BOOL any_ready; +int np,ns, i,ready_handles,n; +APIRET rc; + +sd.have_read=FALSE; sd.have_write=FALSE; +sd.socket_nread=0; sd.socket_nwrite=0; sd.socket_ntotal=0; +sd.max_fds=31; ready_handles=0; any_ready=FALSE; +sd.pipe_ntotal=0; sd.pipe_have_write=FALSE; + +if(FirstTime){ + /* First load the so32dll.dll module and get a pointer to the SELECT function */ + + if((rc=DosLoadModule(faildata,sizeof(faildata),"SO32DLL",&hmod_so32dll))!=0){ + fprintf(stderr, "Could not load module so32dll.dll, rc = %d. Error note %s\n",rc,faildata); + haveTCPIP=FALSE; + } + if((rc = DosQueryProcAddr(hmod_so32dll, 0, "SELECT", (PPFN)&os2_tcp_select))!=0){ + fprintf(stderr, "Could not query address of SELECT, rc = %d.\n",rc); + haveTCPIP=FALSE; + } + /* Call these a first time to set the semaphore */ + /* rc = DosCreateEventSem(NULL, &hPipeSem, DC_SEM_SHARED, FALSE); + if(rc) { + fprintf(stderr, "Could not create event semaphore, rc=%d\n",rc); + return(-1); + } + rc = DosResetEventSem(hPipeSem, &postCount); */ /* Done in xtrans code for servers*/ + + /*fprintf(stderr, "Client select() done first-time stuff, sem handle %d.\n",hPipeSem);*/ + + FirstTime = FALSE; +} + +/* Set up the time delay structs */ + + if(timeout!=NULL) { + timeout_ms=timeout->tv_sec*1000+timeout->tv_usec/1000; + } + else { timeout_ms=1000000; } /* This should be large enough... */ + if(timeout_ms>0) start_millis=os2_get_sys_millis(); + +/* Copy the masks */ + {FD_ZERO(&sd.read_copy);} + {FD_ZERO(&sd.write_copy);} + if(readfds!=NULL){ XFD_COPYSET(readfds,&sd.read_copy); sd.have_read=TRUE;} + if(writefds!=NULL) {XFD_COPYSET(writefds,&sd.write_copy);sd.have_write=TRUE;} + +/* And zero the original masks */ + if(sd.have_read){ FD_ZERO(readfds);} + if(sd.have_write) {FD_ZERO(writefds);} + if(exceptfds != NULL) {FD_ZERO(exceptfds);} + +/* Now we parse the fd_sets passed to select and separate pipe/sockets */ + n = os2_parse_select(&sd,nfds); + if(n == -1) { + errno = EBADF; + return (-1); + } + +/* Now we have three cases: either we have sockets, pipes, or both */ +/* We handle all three cases differently to optimize things */ + +/* Case 1: only pipes! */ + if((sd.pipe_ntotal >0) && (!sd.socket_ntotal)){ + np = os2_check_pipes(&sd,readfds,writefds); + if(np > 0){ + return (np); + } + else if (np == -1) { return(-1); } + while(!any_ready){ + rc = DosWaitEventSem(hPipeSem, 1L); + /* if(rc) fprintf(stderr,"Sem-wait timeout, rc = %d\n",rc); */ + if(rc == 640) { + return(0); + } + if((rc != 0) && (rc != 95)) {errno= EBADF; return(-1);} + np = os2_check_pipes(&sd,readfds,writefds); + if (np > 0){ + return(np); + } + else if (np < 0){ return(-1); } + } + } + +/* Case 2: only sockets. Just let the os/2 tcp select do the work */ + if((sd.socket_ntotal > 0) && (!sd.pipe_ntotal)){ + ns = os2_check_sockets(&sd, readfds, writefds, timeout_ms); + return (ns); + } + +/* Case 3: combination of both */ + if((sd.socket_ntotal > 0) && (sd.pipe_ntotal)){ + np = os2_check_pipes(&sd,readfds,writefds); + if(np > 0){ + any_ready=TRUE; + ready_handles += np; + } + else if (np == -1) { return(-1); } + + ns = os2_check_sockets(&sd,readfds,writefds, 0); + if(ns>0){ + ready_handles+=ns; + any_ready = TRUE; + } + else if (ns == -1) {return(-1);} + + while (!any_ready && timeout_ms){ + + rc = DosWaitEventSem(hPipeSem, 1L); + if (rc==640) return(0); + if(rc == 0){ + np = os2_check_pipes(&sd,readfds,writefds); + if(np > 0){ + ready_handles+=np; + any_ready = TRUE; + } + else if (np == -1) { + return(-1); } + } + + ns = os2_check_sockets(&sd,readfds,writefds,exceptfds, 0); + if(ns>0){ + ready_handles+=ns; + any_ready = TRUE; + } + else if (ns == -1) {return(-1);} + + if (i%8 == 0) { + now_millis = os2_get_sys_millis(); + if((now_millis-start_millis) > timeout_ms) timeout_ms = 0; + } + i++; + } + } + +return(ready_handles); +} + + +ULONG os2_get_sys_millis() +{ + APIRET rc; + ULONG milli; + + rc = DosQuerySysInfo(14, 14, &milli, sizeof(milli)); + if(rc) { + fprintf(stderr,"Bad return code querying the millisecond counter! rc=%d\n",rc); + return(0); + } + return(milli); +} + +int os2_parse_select(sd,nfds) +struct select_data *sd; +int nfds; +{ + int i; + APIRET rc; +/* First we determine up to which descriptor we need to check. */ +/* No need to check up to 256 if we don't have to (and usually we dont...)*/ +/* Note: stuff here is hardcoded for fd_sets which are int[8] as in EMX! */ + + if(nfds > sd->max_fds){ + for(i=0;i<((FD_SETSIZE+31)/32);i++){ + if(sd->read_copy.fds_bits[i] || + sd->write_copy.fds_bits[i]) + sd->max_fds=(i*32) +32; + } + } + else { sd->max_fds = nfds; } +/* Check if result is greater than specified in select() call */ + if(sd->max_fds > nfds) sd->max_fds = nfds; + + if (sd->have_read) + { + for (i = 0; i < sd->max_fds; ++i) { + if (FD_ISSET (i, &sd->read_copy)){ + if(_files[i] & F_SOCKET) + { + sd->tcp_select_mask[sd->socket_ntotal]=_getsockhandle(i); + sd->tcp_emx_handles[sd->socket_ntotal]=i; + sd->socket_ntotal++; sd->socket_nread++; + } + else if (_files[i] & F_PIPE) + { + sd -> pipe_ntotal++; + /* rc = DosSetNPipeSem((HPIPE)i, (HSEM) hPipeSem, i); + if(rc) { fprintf(stderr,"Error SETNPIPE rc = %d\n",rc); return -1;} */ + } + } + } + } + + if (sd->have_write) + { + for (i = 0; i < sd->max_fds; ++i) { + if (FD_ISSET (i, &sd->write_copy)){ + if(_files[i] & F_SOCKET) + { + sd->tcp_select_mask[sd->socket_ntotal]=_getsockhandle(i); + sd->tcp_emx_handles[sd->socket_ntotal]=i; + sd->socket_ntotal++; sd->socket_nwrite++; + } + else if (_files[i] & F_PIPE) + { + sd -> pipe_ntotal++; + /* rc = DosSetNPipeSem((HPIPE)i, (HSEM) hPipeSem, i); + if(rc) { fprintf(stderr,"Error SETNPIPE rc = %d\n",rc); return -1;} */ + sd -> pipe_have_write=TRUE; + } + } + } + } + + +return(sd->socket_ntotal); +} + + +int os2_check_sockets(sd,readfds,writefds) +struct select_data *sd; +fd_set *readfds,*writefds; +{ + int e,i; + int j,n; + memcpy(sd->tcp_select_copy,sd->tcp_select_mask, + sd->socket_ntotal*sizeof(int)); + + e = os2_tcp_select(sd->tcp_select_copy,sd->socket_nread, + sd->socket_nwrite, 0, 0); + + if(e == 0) return(e); +/* We have something ready? */ + if(e>0){ + j = 0; n = 0; + for (i = 0; i < sd->socket_nread; ++i, ++j) + if (sd->tcp_select_copy[j] != -1) + { + FD_SET (sd->tcp_emx_handles[j], readfds); + n ++; + } + for (i = 0; i < sd->socket_nwrite; ++i, ++j) + if (sd->tcp_select_copy[j] != -1) + { + FD_SET (sd->tcp_emx_handles[j], writefds); + n ++; + } + errno = 0; + + return n; + } + if(e<0){ + /*Error -- TODO. EBADF is a good choice for now. */ + fprintf(stderr,"Error in server select! e=%d\n",e); + errno = EBADF; + return (-1); + } + } + +/* Check to see if anything is ready on pipes */ + +int os2_check_pipes(sd,readfds,writefds) +struct select_data *sd; +fd_set *readfds,*writefds; +{ +int i,e; +ULONG ulPostCount; +PIPESEMSTATE pipeSemState[128]; +APIRET rc; + e = 0; + rc = DosResetEventSem(hPipeSem,&ulPostCount); + rc = DosQueryNPipeSemState((HSEM) hPipeSem, (PPIPESEMSTATE)&pipeSemState, + sizeof(pipeSemState)); + if(rc) fprintf(stderr,"SELECT: rc from QueryNPipeSem: %d\n",rc); + i=0; + while (pipeSemState[i].fStatus != 0) { + /*fprintf(stderr,"SELECT: sem entry, stat=%d, flag=%d, key=%d,avail=%d\n", + pipeSemState[i].fStatus,pipeSemState[i].fFlag,pipeSemState[i].usKey, + pipeSemState[i].usAvail); */ + if((pipeSemState[i].fStatus == 1) && + (FD_ISSET(pipeSemState[i].usKey,&sd->read_copy))){ + FD_SET(pipeSemState[i].usKey,readfds); + e++; + } + else if((pipeSemState[i].fStatus == 2) && + (FD_ISSET(pipeSemState[i].usKey,&sd->write_copy))){ + FD_SET(pipeSemState[i].usKey,writefds); + e++; + } + else if( (pipeSemState[i].fStatus == 3) && + ( (FD_ISSET(pipeSemState[i].usKey,&sd->read_copy)) || + (FD_ISSET(pipeSemState[i].usKey,&sd->write_copy)) )){ + errno = EBADF; + /* fprintf(stderr,"Pipe has closed down, fd=%d\n",pipeSemState[i].usKey); */ + return (-1); + } + i++; + } /* endwhile */ + /*fprintf(stderr,"Done listing pipe sem entries, total %d entries, total ready entries %d\n",i,e);*/ +errno = 0; +return(e); +} + |