source: trunk/packages/vizservers/vtkvis/RenderServer.cpp @ 4366

Last change on this file since 4366 was 4366, checked in by ldelgass, 10 years ago

use string stream instead of Tcl string
  • Property svn:eol-style set to native
File size: 17.2 KB
Line 
1/* -*- mode: c++; c-basic-offset: 4; indent-tabs-mode: nil -*- */
2/*
3 * Copyright (C) 2004-2012  HUBzero Foundation, LLC
4 *
5 * Author: Leif Delgass <ldelgass@purdue.edu>
6 */
7
8#include <cstdio>
9#include <cstring>
10#include <cstdlib>
11#include <cerrno>
12#include <unistd.h>
13#include <signal.h>
14#include <sys/types.h>
15#include <sys/stat.h>
16#include <fcntl.h>
17#include <sys/time.h>
18#include <sys/times.h>
19
20#include <string>
21#include <sstream>
22
23#include <tcl.h>
24
25#include <vtksys/SystemInformation.hxx>
26
27#include "Trace.h"
28#include "ReadBuffer.h"
29#include "RenderServer.h"
30#include "RendererCmd.h"
31#include "Renderer.h"
32#include "PPMWriter.h"
33#include "TGAWriter.h"
34#ifdef USE_THREADS
35#include <pthread.h>
36#include "ResponseQueue.h"
37#endif
38#include <md5.h>
39
40using namespace VtkVis;
41
42Stats VtkVis::g_stats;
43
44int VtkVis::g_statsFile = -1; ///< Stats output file descriptor.
45int VtkVis::g_fdIn = STDIN_FILENO; ///< Input file descriptor
46int VtkVis::g_fdOut = STDOUT_FILENO; ///< Output file descriptor
47FILE *VtkVis::g_fOut = NULL; ///< Output file handle
48FILE *VtkVis::g_fLog = NULL; ///< Trace logging file handle
49Renderer *VtkVis::g_renderer = NULL; ///< Main render worker
50ReadBuffer *VtkVis::g_inBufPtr = NULL; ///< Socket read buffer
51
52#ifdef USE_THREADS
53static void
54queueFrame(ResponseQueue *queue, vtkUnsignedCharArray *imgData)
55{
56#ifdef DEBUG
57    if (g_renderer->getCameraMode() == Renderer::IMAGE) {
58        double xywh[4];
59        g_renderer->getScreenWorldCoords(xywh);
60        TRACE("Image bbox: %g %g %g %g",
61              xywh[0],
62              (xywh[1] + xywh[3]),
63              (xywh[0] + xywh[2]),
64              xywh[1]);
65    }
66
67#ifdef RENDER_TARGA
68    writeTGAFile("/tmp/frame.tga",
69                 imgData->GetPointer(0),
70                 g_renderer->getWindowWidth(),
71                 g_renderer->getWindowHeight(),
72                 TARGA_BYTES_PER_PIXEL);
73#else
74    writeTGAFile("/tmp/frame.tga",
75                 imgData->GetPointer(0),
76                 g_renderer->getWindowWidth(),
77                 g_renderer->getWindowHeight(),
78                 TARGA_BYTES_PER_PIXEL,
79                 true);
80#endif  /*RENDER_TARGA*/
81
82#else
83    if (g_renderer->getCameraMode() == Renderer::IMAGE) {
84        double xywh[4];
85        g_renderer->getCameraZoomRegion(xywh);
86        std::ostringstream oss;
87        oss.precision(12);
88        // Send upper left and lower right corners as bbox
89        oss << "nv>image -type image -bbox {"
90            << std::scientific
91            << xywh[0] << " "
92            << xywh[1] << " "
93            << xywh[2] << " "
94            << xywh[3] << "} -bytes";
95
96#ifdef RENDER_TARGA
97        queueTGA(queue, oss.str().c_str(),
98                 imgData->GetPointer(0),
99                 g_renderer->getWindowWidth(),
100                 g_renderer->getWindowHeight(),
101                 TARGA_BYTES_PER_PIXEL);
102#else
103        queuePPM(queue, oss.str().c_str(),
104                 imgData->GetPointer(0),
105                 g_renderer->getWindowWidth(),
106                 g_renderer->getWindowHeight());
107#endif  /*RENDER_TARGA*/
108    } else {
109#ifdef RENDER_TARGA
110        queueTGA(queue, "nv>image -type image -bytes",
111                 imgData->GetPointer(0),
112                 g_renderer->getWindowWidth(),
113                 g_renderer->getWindowHeight(),
114                 TARGA_BYTES_PER_PIXEL);
115#else
116        queuePPM(queue, "nv>image -type image -bytes",
117                 imgData->GetPointer(0),
118                 g_renderer->getWindowWidth(),
119                 g_renderer->getWindowHeight());
120#endif  /*RENDER_TARGA*/
121    }
122#endif  /*DEBUG*/
123}
124
125#else
126
127static void
128writeFrame(int fd, vtkUnsignedCharArray *imgData)
129{
130#ifdef DEBUG
131    if (g_renderer->getCameraMode() == Renderer::IMAGE) {
132        double xywh[4];
133        g_renderer->getScreenWorldCoords(xywh);
134        TRACE("Image bbox: %g %g %g %g",
135              xywh[0],
136              (xywh[1] + xywh[3]),
137              (xywh[0] + xywh[2]),
138              xywh[1]);
139    }
140
141#ifdef RENDER_TARGA
142    writeTGAFile("/tmp/frame.tga",
143                 imgData->GetPointer(0),
144                 g_renderer->getWindowWidth(),
145                 g_renderer->getWindowHeight(),
146                 TARGA_BYTES_PER_PIXEL);
147#else
148    writeTGAFile("/tmp/frame.tga",
149                 imgData->GetPointer(0),
150                 g_renderer->getWindowWidth(),
151                 g_renderer->getWindowHeight(),
152                 TARGA_BYTES_PER_PIXEL,
153                 true);
154#endif  /*RENDER_TARGA*/
155
156#else
157    if (g_renderer->getCameraMode() == Renderer::IMAGE) {
158        double xywh[4];
159        g_renderer->getCameraZoomRegion(xywh);
160        std::ostringstream oss;
161        oss.precision(12);
162        // Send upper left and lower right corners as bbox
163        oss << "nv>image -type image -bbox {"
164            << std::scientific
165            << xywh[0] << " "
166            << xywh[1] << " "
167            << xywh[2] << " "
168            << xywh[3] << "} -bytes";
169
170#ifdef RENDER_TARGA
171        writeTGA(fd, oss.str().c_str(),
172                 imgData->GetPointer(0),
173                 g_renderer->getWindowWidth(),
174                 g_renderer->getWindowHeight(),
175                 TARGA_BYTES_PER_PIXEL);
176#else
177        writePPM(fd, oss.str().c_str(),
178                 imgData->GetPointer(0),
179                 g_renderer->getWindowWidth(),
180                 g_renderer->getWindowHeight());
181#endif  /*RENDER_TARGA*/
182    } else {
183#ifdef RENDER_TARGA
184        writeTGA(fd, "nv>image -type image -bytes",
185                 imgData->GetPointer(0),
186                 g_renderer->getWindowWidth(),
187                 g_renderer->getWindowHeight(),
188                 TARGA_BYTES_PER_PIXEL);
189#else
190        writePPM(fd, "nv>image -type image -bytes",
191                 imgData->GetPointer(0),
192                 g_renderer->getWindowWidth(),
193                 g_renderer->getWindowHeight());
194#endif  /*RENDER_TARGA*/
195    }
196#endif  /*DEBUG*/
197}
198#endif /*USE_THREADS*/
199
200static int
201sendAck(ClientData clientData, int fdOut)
202{
203    std::ostringstream oss;
204    oss << "nv>ok -token " << g_stats.nCommands <<  "\n";
205    int nBytes = oss.str().length();
206
207    TRACE("Sending OK for commands through %lu", g_stats.nCommands);
208#ifdef USE_THREADS
209    queueResponse(clientData, oss.str().c_str(), nBytes, Response::VOLATILE, Response::OK);
210#else
211    if (write(fdOut, oss.str().c_str(), nBytes) < 0) {
212        ERROR("write failed: %s", strerror(errno));
213        return -1;
214    }
215#endif
216    return 0;
217}
218
219int
220VtkVis::getStatsFile(Tcl_Interp *interp, Tcl_Obj *objPtr)
221{
222    Tcl_Obj **objv;
223    int objc;
224    int i;
225    char fileName[33];
226    const char *path;
227    md5_state_t state;
228    md5_byte_t digest[16];
229    char *string;
230    int length;
231
232    if ((objPtr == NULL) || (g_statsFile >= 0)) {
233        return g_statsFile;
234    }
235    if (Tcl_ListObjGetElements(interp, objPtr, &objc, &objv) != TCL_OK) {
236        return -1;
237    }
238    Tcl_ListObjAppendElement(interp, objPtr, Tcl_NewStringObj("pid", 3));
239    Tcl_ListObjAppendElement(interp, objPtr, Tcl_NewIntObj(getpid()));
240    string = Tcl_GetStringFromObj(objPtr, &length);
241
242    md5_init(&state);
243    md5_append(&state, (const md5_byte_t *)string, length);
244    md5_finish(&state, digest);
245    for (i = 0; i < 16; i++) {
246        sprintf(fileName + i * 2, "%02x", digest[i]);
247    }
248    std::ostringstream oss;
249    oss << STATSDIR << "/" << fileName;
250    path = oss.str().c_str();
251
252    g_statsFile = open(path, O_EXCL | O_CREAT | O_WRONLY, 0600);
253    if (g_statsFile < 0) {
254        ERROR("can't open \"%s\": %s", fileName, strerror(errno));
255        return -1;
256    }
257    return g_statsFile;
258}
259
260int
261VtkVis::writeToStatsFile(int f, const char *s, size_t length)
262{
263    if (f >= 0) {
264        ssize_t numWritten;
265
266        numWritten = write(f, s, length);
267        if (numWritten == (ssize_t)length) {
268            close(dup(f));
269        }
270    }
271    return 0;
272}
273
274static int
275serverStats(int code)
276{
277    double start, finish;
278    char buf[BUFSIZ];
279    Tcl_DString ds;
280    int result;
281    int f;
282
283    {
284        struct timeval tv;
285
286        /* Get ending time.  */
287        gettimeofday(&tv, NULL);
288        finish = CVT2SECS(tv);
289        tv = g_stats.start;
290        start = CVT2SECS(tv);
291    }
292    /*
293     * Session information:
294     *   - Name of render server
295     *   - Process ID
296     *   - Hostname where server is running
297     *   - Start date of session
298     *   - Start date of session in seconds
299     *   - Number of data sets loaded from client
300     *   - Number of data bytes total loaded from client
301     *   - Number of frames returned
302     *   - Number of bytes total returned (in frames)
303     *   - Number of commands received
304     *   - Total elapsed time of all commands
305     *   - Total elapsed time of session
306     *   - Exit code of vizserver
307     *   - User time
308     *   - System time
309     *   - User time of children
310     *   - System time of children
311     */
312
313    Tcl_DStringInit(&ds);
314   
315    Tcl_DStringAppendElement(&ds, "render_stop");
316    /* renderer */
317    Tcl_DStringAppendElement(&ds, "renderer");
318    Tcl_DStringAppendElement(&ds, "vtkvis");
319    /* pid */
320    Tcl_DStringAppendElement(&ds, "pid");
321    sprintf(buf, "%d", getpid());
322    Tcl_DStringAppendElement(&ds, buf);
323    /* host */
324    Tcl_DStringAppendElement(&ds, "host");
325    gethostname(buf, BUFSIZ-1);
326    buf[BUFSIZ-1] = '\0';
327    Tcl_DStringAppendElement(&ds, buf);
328    /* date */
329    Tcl_DStringAppendElement(&ds, "date");
330    strcpy(buf, ctime(&g_stats.start.tv_sec));
331    buf[strlen(buf) - 1] = '\0';
332    Tcl_DStringAppendElement(&ds, buf);
333    /* date_secs */
334    Tcl_DStringAppendElement(&ds, "date_secs");
335    sprintf(buf, "%ld", g_stats.start.tv_sec);
336    Tcl_DStringAppendElement(&ds, buf);
337    /* num_data_sets */
338    Tcl_DStringAppendElement(&ds, "num_data_sets");
339    sprintf(buf, "%lu", (unsigned long int)g_stats.nDataSets);
340    Tcl_DStringAppendElement(&ds, buf);
341    /* data_set_bytes */
342    Tcl_DStringAppendElement(&ds, "data_set_bytes");
343    sprintf(buf, "%lu", (unsigned long int)g_stats.nDataBytes);
344    Tcl_DStringAppendElement(&ds, buf);
345    /* num_frames */
346    Tcl_DStringAppendElement(&ds, "num_frames");
347    sprintf(buf, "%lu", (unsigned long int)g_stats.nFrames);
348    Tcl_DStringAppendElement(&ds, buf);
349    /* frame_bytes */
350    Tcl_DStringAppendElement(&ds, "frame_bytes");
351    sprintf(buf, "%lu", (unsigned long int)g_stats.nFrameBytes);
352    Tcl_DStringAppendElement(&ds, buf);
353    /* num_commands */
354    Tcl_DStringAppendElement(&ds, "num_commands");
355    sprintf(buf, "%lu", (unsigned long int)g_stats.nCommands);
356    Tcl_DStringAppendElement(&ds, buf);
357    /* cmd_time */
358    Tcl_DStringAppendElement(&ds, "cmd_time");
359    sprintf(buf, "%g", g_stats.cmdTime);
360    Tcl_DStringAppendElement(&ds, buf);
361    /* session_time */
362    Tcl_DStringAppendElement(&ds, "session_time");
363    sprintf(buf, "%g", finish - start);
364    Tcl_DStringAppendElement(&ds, buf);
365    /* status */
366    Tcl_DStringAppendElement(&ds, "status");
367    sprintf(buf, "%d", code);
368    Tcl_DStringAppendElement(&ds, buf);
369    {
370        long clocksPerSec = sysconf(_SC_CLK_TCK);
371        double clockRes = 1.0 / clocksPerSec;
372        struct tms tms;
373
374        memset(&tms, 0, sizeof(tms));
375        times(&tms);
376        /* utime */
377        Tcl_DStringAppendElement(&ds, "utime");
378        sprintf(buf, "%g", tms.tms_utime * clockRes);
379        Tcl_DStringAppendElement(&ds, buf);
380        /* stime */
381        Tcl_DStringAppendElement(&ds, "stime");
382        sprintf(buf, "%g", tms.tms_stime * clockRes);
383        Tcl_DStringAppendElement(&ds, buf);
384        /* cutime */
385        Tcl_DStringAppendElement(&ds, "cutime");
386        sprintf(buf, "%g", tms.tms_cutime * clockRes);
387        Tcl_DStringAppendElement(&ds, buf);
388        /* cstime */
389        Tcl_DStringAppendElement(&ds, "cstime");
390        sprintf(buf, "%g", tms.tms_cstime * clockRes);
391        Tcl_DStringAppendElement(&ds, buf);
392    }
393    Tcl_DStringAppend(&ds, "\n", -1);
394    f = getStatsFile(NULL, NULL);
395    result = writeToStatsFile(f, Tcl_DStringValue(&ds),
396                              Tcl_DStringLength(&ds));
397    close(f);
398    Tcl_DStringFree(&ds);
399    return result;
400}
401
402static void
403initService()
404{
405    // Create a stream associated with the output file descriptor
406    g_fOut = fdopen(g_fdOut, "w");
407    // If running without a socket, use stdout for debugging
408    if (g_fOut == NULL && g_fdOut != STDOUT_FILENO) {
409        g_fdOut = STDOUT_FILENO;
410        g_fOut = stdout;
411    }
412
413    const char *user = getenv("USER");
414    char *logName = NULL;
415    int logNameLen = 0;
416
417    if (user == NULL) {
418        logNameLen = 19+1;
419        logName = (char *)calloc(logNameLen, sizeof(char));
420        strncpy(logName, "/tmp/vtkvis_log.txt", logNameLen);
421    }
422    else {
423        logNameLen = 16+strlen(user)+4+1;
424        logName = (char *)calloc(logNameLen, sizeof(char));
425        strncpy(logName, "/tmp/vtkvis_log_", logNameLen);
426        strncat(logName, user, strlen(user));
427        strncat(logName, ".txt", 4);
428    }
429
430    // open log and map stderr to log file
431    g_fLog = fopen(logName, "w");
432    dup2(fileno(g_fLog), STDERR_FILENO);
433    // If we are writing to socket, map stdout to log
434    if (g_fdOut != STDOUT_FILENO) {
435        dup2(fileno(g_fLog), STDOUT_FILENO);
436    }
437
438    fflush(stdout);
439
440    // clean up malloc'd memory
441    if (logName != NULL) {
442        free(logName);
443    }
444}
445
446static void
447exitService()
448{
449    serverStats(0);
450
451    // close log file
452    if (g_fLog != NULL) {
453        fclose(g_fLog);
454        g_fLog = NULL;
455    }
456}
457
458#ifdef USE_THREADS
459
460static void *
461writerThread(void *clientData)
462{
463    ResponseQueue *queue = (ResponseQueue *)clientData;
464
465    TRACE("Starting writer thread");
466    for (;;) {
467        Response *response = queue->dequeue();
468        if (response == NULL)
469            continue;
470        if (fwrite(response->message(), sizeof(unsigned char), response->length(),
471                   g_fOut) != response->length()) {
472            ERROR("short write while trying to write %ld bytes",
473                  response->length());
474        }
475        fflush(g_fOut);
476        TRACE("Wrote response of type %d", response->type());
477        delete response;
478        if (feof(g_fOut))
479            break;
480    }   
481    return NULL;
482}
483
484#endif  /*USE_THREADS*/
485
486int
487main(int argc, char *argv[])
488{
489    // Ignore SIGPIPE.  **Is this needed? **
490    signal(SIGPIPE, SIG_IGN);
491
492    while (1) {
493        int c = getopt(argc, argv, "i:o:");
494        if (c == -1) {
495            break;
496        }
497        switch (c) {
498        case 'i': {
499            int fd = atoi(optarg);
500            if (fd >=0 && fd < 5) {
501                g_fdIn = fd;
502            }
503        }
504            break;
505        case 'o': {
506            int fd = atoi(optarg);
507            if (fd >=0 && fd < 5) {
508                g_fdOut = fd;
509            }
510        }
511            break;
512        case '?':
513            break;
514        default:
515            return 1;
516        }
517    }
518
519    initService();
520    initLog();
521
522    memset(&g_stats, 0, sizeof(g_stats));
523    gettimeofday(&g_stats.start, NULL);
524
525    TRACE("Starting VTKVis Server");
526
527    // Sanity check: log descriptor can't be used for client IO
528    if (fileno(g_fLog) == g_fdIn) {
529        ERROR("Invalid input file descriptor");
530        return 1;
531    }
532    if (fileno(g_fLog) == g_fdOut) {
533        ERROR("Invalid output file descriptor");
534        return 1;
535    }
536    TRACE("File descriptors: in %d out %d log %d", g_fdIn, g_fdOut, fileno(g_fLog));
537
538#ifdef WANT_TRACE
539    vtksys::SystemInformation::SetStackTraceOnError(1);
540#endif
541
542    /* This synchronizes the client with the server, so that the client
543     * doesn't start writing commands before the server is ready. It could
544     * also be used to supply information about the server (version, memory
545     * size, etc). */
546    fprintf(g_fOut, "VtkVis %s (build %s)\n", VTKVIS_VERSION_STRING, SVN_VERSION);
547    fflush(g_fOut);
548
549    g_renderer = new Renderer();
550    g_inBufPtr = new ReadBuffer(g_fdIn, 1<<12);
551
552    Tcl_Interp *interp = Tcl_CreateInterp();
553    ClientData clientData = NULL;
554#ifdef USE_THREADS
555    ResponseQueue *queue = new ResponseQueue();
556    clientData = (ClientData)queue;
557    initTcl(interp, clientData);
558
559    pthread_t writerThreadId;
560    if (pthread_create(&writerThreadId, NULL, &writerThread, queue) < 0) {
561        ERROR("Can't create writer thread: %s", strerror(errno));
562    }
563#else
564    initTcl(interp, clientData);
565#endif
566
567    vtkSmartPointer<vtkUnsignedCharArray> imgData =
568        vtkSmartPointer<vtkUnsignedCharArray>::New();
569
570    // Start main server loop
571    for (;;) {
572        if (processCommands(interp, clientData, g_inBufPtr, g_fdOut) < 0)
573            break;
574
575        if (g_renderer->render()) {
576            TRACE("Rendering new frame");
577            g_renderer->getRenderedFrame(imgData);
578#ifdef USE_THREADS
579            queueFrame(queue, imgData);
580#else
581            writeFrame(g_fdOut, imgData);
582#endif
583            g_stats.nFrames++;
584            g_stats.nFrameBytes += imgData->GetDataSize() * imgData->GetDataTypeSize();
585        } else {
586            TRACE("No render required");
587            sendAck(clientData, g_fdOut);
588        }
589
590        if (g_inBufPtr->status() == ReadBuffer::ENDFILE)
591            break;
592    }
593#ifdef USE_THREADS
594    // Writer thread is probably blocked on sem_wait, so cancel instead
595    // of joining
596    if (pthread_cancel(writerThreadId) < 0) {
597        ERROR("Can't cancel writer thread: %s", strerror(errno));
598    } else {
599        TRACE("Cancelled writer thread");
600    }
601
602    TRACE("Deleting ResponseQueue");
603    delete queue;
604    queue = NULL;
605#endif
606
607    TRACE("Stopping Tcl interpreter");
608    exitTcl(interp);
609    interp = NULL;
610
611    TRACE("Deleting ReadBuffer");
612    delete g_inBufPtr;
613    g_inBufPtr = NULL;
614
615    TRACE("Deleting renderer");
616    delete g_renderer;
617    g_renderer = NULL;
618
619    TRACE("Exiting VTKVis Server");
620
621    closeLog();
622    exitService();
623
624    return 0;
625}
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