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boinc/clientscr/screensaver.cpp

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// This file is part of BOINC.
// http://boinc.berkeley.edu
// Copyright (C) 2008 University of California
//
// BOINC is free software; you can redistribute it and/or modify it
// under the terms of the GNU Lesser General Public License
// as published by the Free Software Foundation,
// either version 3 of the License, or (at your option) any later version.
//
// BOINC is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
// See the GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with BOINC. If not, see <http://www.gnu.org/licenses/>.
// Screensaver coordinator.
// Alternates between a "default screensaver"
// and application graphics for running jobs.
// Periods are configurable via config file "ss_config.xml".
// See http://boinc.berkeley.edu/trac/wiki/ScreensaverEnhancements
#ifdef _WIN32
#include "boinc_win.h"
#endif
#ifdef __APPLE__
#include <Carbon/Carbon.h>
#include <sys/wait.h>
#endif
// Common application includes
//
#include "diagnostics.h"
#include "common_defs.h"
#include "util.h"
#include "common_defs.h"
#include "filesys.h"
#include "error_numbers.h"
#include "gui_rpc_client.h"
#include "str_util.h"
#include "str_replace.h"
#include "screensaver.h"
// Platform specific application includes
//
#if defined(_WIN32)
#include "screensaver_win.h"
#elif defined(__APPLE__)
#include "Mac_Saver_Module.h"
#endif
#ifdef _WIN32
// Allow for Unicode wide characters
#define PATH_SEPARATOR (_T("\\"))
#define THE_DEFAULT_SS_EXECUTABLE (_T(DEFAULT_SS_EXECUTABLE))
#define THE_SS_CONFIG_FILE (_T(SS_CONFIG_FILE))
#define DEFAULT_GFX_CANT_CONNECT ERR_CONNECT
#else
// Using (_T()) here causes compiler errors on Mac
#define PATH_SEPARATOR "/"
#define THE_DEFAULT_SS_EXECUTABLE DEFAULT_SS_EXECUTABLE
#define THE_SS_CONFIG_FILE SS_CONFIG_FILE
#define DEFAULT_GFX_CANT_CONNECT (ERR_CONNECT & 0xff)
#endif
// Flags for testing & debugging
#define SIMULATE_NO_GRAPHICS 0
bool CScreensaver::is_same_task(RESULT* taska, RESULT* taskb) {
if ((taska == NULL) || (taskb == NULL)) return false;
if (taska->name != taskb->name) return false;
if (taska->project_url != taskb->project_url) return false;
return true;
}
int CScreensaver::count_active_graphic_apps(RESULTS& results, RESULT* exclude) {
unsigned int i = 0;
unsigned int graphics_app_count = 0;
m_bV5_GFX_app_is_running = false;
// Count the number of active graphics-capable apps excluding the specified result.
// If exclude is NULL, don't exclude any results.
for (i = 0; i < results.results.size(); i++) {
BOINCTRACE(_T("get_random_graphics_app -- active task detected\n"));
BOINCTRACE(
_T("get_random_graphics_app -- name = '%s', path = '%s'\n"),
results.results[i]->name.c_str(), results.results[i]->graphics_exec_path.c_str()
);
if (results.results[i]->supports_graphics) m_bV5_GFX_app_is_running = true;
if ((results.results[i]->graphics_exec_path.size() == 0)
&& (state.executing_as_daemon || !(results.results[i]->supports_graphics))) continue;
BOINCTRACE(_T("get_random_graphics_app -- active task detected w/graphics\n"));
if (is_same_task(results.results[i], exclude)) continue;
graphics_app_count++;
}
return graphics_app_count;
}
// Choose a random graphics application out of the vector.
// Exclude the specified result unless it is the only candidate.
// If exclude is NULL or an empty string, don't exclude any results.
//
RESULT* CScreensaver::get_random_graphics_app(RESULTS& results, RESULT* exclude) {
RESULT* rp = NULL;
unsigned int i = 0;
unsigned int graphics_app_count = 0;
unsigned int random_selection = 0;
unsigned int current_counter = 0;
RESULT *avoid = exclude;
BOINCTRACE(_T("get_random_graphics_app -- Function Start\n"));
graphics_app_count = count_active_graphic_apps(results, avoid);
BOINCTRACE(_T("get_random_graphics_app -- graphics_app_count = '%d'\n"), graphics_app_count);
// If no graphics app found other than the one excluded, count again without excluding any
if ((0 == graphics_app_count) && (avoid != NULL)) {
avoid = NULL;
graphics_app_count = count_active_graphic_apps(results, avoid);
}
// If no graphics app was found, return NULL
if (0 == graphics_app_count) {
goto CLEANUP;
}
// Choose which application to display.
random_selection = (rand() % graphics_app_count) + 1;
BOINCTRACE(_T("get_random_graphics_app -- random_selection = '%d'\n"), random_selection);
// Lets find the chosen graphics application.
for (i = 0; i < results.results.size(); i++) {
if ((results.results[i]->graphics_exec_path.size() == 0)
&& (state.executing_as_daemon || !(results.results[i]->supports_graphics))) continue;
if (is_same_task(results.results[i], avoid)) continue;
current_counter++;
if (current_counter == random_selection) {
rp = results.results[i];
break;
}
}
CLEANUP:
BOINCTRACE(_T("get_random_graphics_app -- Function End\n"));
return rp;
}
// Launch a project (science) graphics application
//
#ifdef _WIN32
int CScreensaver::launch_screensaver(RESULT* rp, HANDLE& graphics_application)
#else
int CScreensaver::launch_screensaver(RESULT* rp, int& graphics_application)
#endif
{
int retval = 0;
if (!rp->graphics_exec_path.empty()) {
// V6 Graphics
#ifdef __APPLE__
// For sandbox security, use gfx_switcher to launch gfx app
// as user boinc_project and group boinc_project.
//
// For unknown reasons, the graphics application exits with
// "RegisterProcess failed (error = -50)" unless we pass its
// full path twice in the argument list to execv.
char* argv[5];
argv[0] = "gfx_Switcher";
argv[1] = "-launch_gfx";
argv[2] = strrchr(rp->slot_path.c_str(), '/');
if (*argv[2]) argv[2]++; // Point to the slot number in ascii
argv[3] = "--fullscreen";
argv[4] = 0;
retval = run_program(
rp->slot_path.c_str(),
m_gfx_Switcher_Path,
4,
argv,
0,
graphics_application
);
#else
char* argv[3];
argv[0] = "app_graphics"; // not used
argv[1] = "--fullscreen";
argv[2] = 0;
retval = run_program(
rp->slot_path.c_str(),
rp->graphics_exec_path.c_str(),
2,
argv,
0,
graphics_application
);
#endif
} else {
// V5 and Older
DISPLAY_INFO di;
#ifdef _WIN32
graphics_application = NULL;
memset(di.window_station, 0, sizeof(di.window_station));
memset(di.desktop, 0, sizeof(di.desktop));
memset(di.display, 0, sizeof(di.display));
// Retrieve the current window station and desktop names
GetUserObjectInformation(
GetProcessWindowStation(),
UOI_NAME,
di.window_station,
(sizeof(di.window_station)),
NULL
);
GetUserObjectInformation(
GetThreadDesktop(GetCurrentThreadId()),
UOI_NAME,
di.desktop,
sizeof(di.desktop),
NULL
);
#else
char *p = getenv("DISPLAY");
if (p) strcpy(di.display, p);
graphics_application = 0;
#endif
retval = rpc->show_graphics(
rp->project_url.c_str(),
rp->name.c_str(),
MODE_FULLSCREEN,
di
);
}
return retval;
}
// Terminate any V6 acreensaver graphics application
//
#ifdef _WIN32
int CScreensaver::terminate_v6_screensaver(HANDLE& graphics_application)
#else
int CScreensaver::terminate_v6_screensaver(int& graphics_application)
#endif
{
int retval = 0;
#ifdef __APPLE__
// Under sandbox security, use gfx_switcher to kill default gfx app
// as user boinc_master and group boinc_master. The man page for
// kill() says the user ID of the process sending the signal must
// match that of the target process, though in practice that seems
// not to be true on the Mac.
char current_dir[PATH_MAX];
char gfx_pid[16];
pid_t thePID;
int i;
sprintf(gfx_pid, "%d", graphics_application);
getcwd( current_dir, sizeof(current_dir));
char* argv[4];
argv[0] = "gfx_switcher";
argv[1] = "-kill_gfx";
argv[2] = gfx_pid;
argv[3] = 0;
retval = run_program(
current_dir,
m_gfx_Switcher_Path,
3,
argv,
0,
thePID
);
for (i=0; i<200; i++) {
boinc_sleep(0.01); // Wait 2 seconds max
// Prevent gfx_switcher from becoming a zombie
if (waitpid(thePID, 0, WNOHANG) == thePID) {
break;
}
}
#endif
// For safety, call kill_program even under Apple sandbox security
kill_program(graphics_application);
return retval;
}
// Terminate the project (science) graphics application
//
#ifdef _WIN32
int CScreensaver::terminate_screensaver(HANDLE& graphics_application, RESULT *worker_app)
#else
int CScreensaver::terminate_screensaver(int& graphics_application, RESULT *worker_app)
#endif
{
int retval = 0;
if (graphics_application) {
// V6 Graphics
if (m_bScience_gfx_running) {
terminate_v6_screensaver(graphics_application);
}
} else {
// V5 and Older
DISPLAY_INFO di;
if (worker_app == NULL) return 0;
if (worker_app->name.empty()) return 0;
memset(di.window_station, 0, sizeof(di.window_station));
memset(di.desktop, 0, sizeof(di.desktop));
memset(di.display, 0, sizeof(di.display));
rpc->show_graphics(
worker_app->project_url.c_str(),
worker_app->name.c_str(),
MODE_HIDE_GRAPHICS,
di
);
}
return retval;
}
// Launch the default graphics application
//
#ifdef _WIN32
int CScreensaver::launch_default_screensaver(char *dir_path, HANDLE& graphics_application)
#else
int CScreensaver::launch_default_screensaver(char *dir_path, int& graphics_application)
#endif
{
int retval = 0;
int num_args;
#ifdef __APPLE__
// For sandbox security, use gfx_switcher to launch default
// gfx app as user boinc_master and group boinc_master.
char* argv[6];
argv[0] = "gfx_switcher";
argv[1] = "-default_gfx";
argv[2] = THE_DEFAULT_SS_EXECUTABLE; // Will be changed by gfx_switcher
argv[3] = "--fullscreen";
argv[4] = 0;
argv[5] = 0;
if (!m_bConnected) {
BOINCTRACE(_T("launch_default_screensaver using --retry_connect argument\n"));
argv[4] = "--retry_connect";
num_args = 5;
} else {
num_args = 4;
}
retval = run_program(
dir_path,
m_gfx_Switcher_Path,
num_args,
argv,
0,
graphics_application
);
BOINCTRACE(_T("launch_default_screensaver returned %d\n"), retval);
#else
// For unknown reasons, the graphics application exits with
// "RegisterProcess failed (error = -50)" unless we pass its
// full path twice in the argument list to execv on Macs.
char* argv[4];
char full_path[1024];
strlcpy(full_path, dir_path, sizeof(full_path));
strlcat(full_path, PATH_SEPARATOR, sizeof(full_path));
strlcat(full_path, THE_DEFAULT_SS_EXECUTABLE, sizeof(full_path));
argv[0] = full_path; // not used
argv[1] = "--fullscreen";
argv[2] = 0;
argv[3] = 0;
if (!m_bConnected) {
BOINCTRACE(_T("launch_default_screensaver using --retry_connect argument\n"));
argv[2] = "--retry_connect";
num_args = 3;
} else {
num_args = 2;
}
retval = run_program(
dir_path,
full_path,
num_args,
argv,
0,
graphics_application
);
BOINCTRACE(_T("launch_default_screensaver %s returned %d\n"), full_path, retval);
#endif
return retval;
}
// Terminate the default graphics application
//
#ifdef _WIN32
int CScreensaver::terminate_default_screensaver(HANDLE& graphics_application)
#else
int CScreensaver::terminate_default_screensaver(int& graphics_application)
#endif
{
int retval = 0;
if (! graphics_application) return 0;
retval = terminate_v6_screensaver(graphics_application);
return retval;
}
// If we cannot connect to the core client:
// - we retry connecting every 10 seconds
// - we launch the default graphics application with the argument --retry_connect, so
// it will continue running and will also retry connecting every 10 seconds.
//
// If we successfully connected to the core client, launch the default graphics application
// without the argument --retry_connect. If it can't connect, it will return immediately
// with the exit code ERR_CONNECT. In that case, we assume it was blocked by a firewall
// and so we run only project (science) graphics.
#ifdef _WIN32
DWORD WINAPI CScreensaver::DataManagementProc()
#else
void *CScreensaver::DataManagementProc()
#endif
{
int retval = 0;
int suspend_reason = 0;
RESULT* theResult = NULL;
RESULT* graphics_app_result_ptr = NULL;
RESULT previous_result;
// previous_result_ptr = &previous_result when previous_result is valid, else NULL
RESULT* previous_result_ptr = NULL;
int iResultCount = 0;
int iIndex = 0;
double default_phase_start_time = 0.0;
double science_phase_start_time = 0.0;
double last_change_time = 0.0;
// If we run default screensaver during science phase because no science graphics
// are available, then shorten next default graphics phase by that much time.
double default_saver_start_time_in_science_phase = 0.0;
double default_saver_duration_in_science_phase = 0.0;
SS_PHASE ss_phase = DEFAULT_SS_PHASE;
bool switch_to_default_gfx = false;
bool killing_default_gfx = false;
int exit_status = 0;
char* default_ss_dir_path = NULL;
char full_path[1024];
BOINCTRACE(_T("CScreensaver::DataManagementProc - Display screen saver loading message\n"));
SetError(TRUE, SCRAPPERR_BOINCSCREENSAVERLOADING); // No GFX App is running: show moving BOINC logo
#ifdef _WIN32
m_tThreadCreateTime = time(0);
// Set the starting point for iterating through the results
m_iLastResultShown = 0;
m_tLastResultChangeTime = 0;
#endif
m_bDefault_ss_exists = false;
m_bScience_gfx_running = false;
m_bDefault_gfx_running = false;
m_bShow_default_ss_first = false;
#ifdef __APPLE__
default_ss_dir_path = "/Library/Application Support/BOINC Data";
#else
default_ss_dir_path = (char*)m_strBOINCInstallDirectory.c_str();
#endif
strlcpy(full_path, default_ss_dir_path, sizeof(full_path));
strlcat(full_path, PATH_SEPARATOR, sizeof(full_path));
strlcat(full_path, THE_DEFAULT_SS_EXECUTABLE, sizeof(full_path));
if (boinc_file_exists(full_path)) {
m_bDefault_ss_exists = true;
} else {
SetError(TRUE, SCRAPPERR_CANTLAUNCHDEFAULTGFXAPP); // No GFX App is running: show moving BOINC logo
}
if (m_bDefault_ss_exists && m_bShow_default_ss_first) {
ss_phase = DEFAULT_SS_PHASE;
default_phase_start_time = dtime();
science_phase_start_time = 0;
switch_to_default_gfx = true;
} else {
ss_phase = SCIENCE_SS_PHASE;
default_phase_start_time = 0;
science_phase_start_time = dtime();
}
while (true) {
for (int i = 0; i < 4; i++) {
// ***
// *** Things that should be run frequently.
// *** 4 times per second.
// ***
// Are we supposed to exit the screensaver?
if (m_QuitDataManagementProc) { // If main thread has requested we exit
if (m_hGraphicsApplication || graphics_app_result_ptr) {
if (m_bDefault_gfx_running) {
terminate_default_screensaver(m_hGraphicsApplication);
} else {
terminate_screensaver(m_hGraphicsApplication, graphics_app_result_ptr);
}
graphics_app_result_ptr = NULL;
previous_result_ptr = NULL;
m_hGraphicsApplication = 0;
}
m_hDataManagementThread = NULL; // Tell main thread that we exited
return 0; // Exit the thread
}
boinc_sleep(0.25);
}
// ***
// *** Things that should be run frequently.
// *** 1 time per second.
// ***
// Blank screen saver?
if ((m_dwBlankScreen) && (time(0) > m_dwBlankTime) && (m_dwBlankTime > 0)) {
BOINCTRACE(_T("CScreensaver::DataManagementProc - Time to blank\n"));
SetError(FALSE, SCRAPPERR_SCREENSAVERBLANKED); // Blanked - hide moving BOINC logo
m_QuitDataManagementProc = true;
continue; // Code above will exit the thread
}
BOINCTRACE(_T("CScreensaver::DataManagementProc - ErrorMode = '%d', ErrorCode = '%x'\n"), m_bErrorMode, m_hrError);
if (!m_bConnected) {
HandleRPCError();
}
if (m_bConnected) {
// Do we need to get the core client state?
if (m_bResetCoreState) {
// Try and get the current state of the CC
retval = rpc->get_state(state);
if (retval) {
// CC may not yet be running
HandleRPCError();
continue;
} else {
m_bResetCoreState = false;
}
}
// Update our task list
retval = rpc->get_screensaver_tasks(suspend_reason, results);
if (retval) {
// rpc call returned error
HandleRPCError();
m_bResetCoreState = true;
continue;
}
} else {
results.clear();
}
// Time to switch to default graphics phase?
if (m_bDefault_ss_exists && (ss_phase == SCIENCE_SS_PHASE) && (m_fGFXDefaultPeriod > 0)) {
if (science_phase_start_time && ((dtime() - science_phase_start_time) > m_fGFXSciencePeriod)) {
if (!m_bDefault_gfx_running) {
switch_to_default_gfx = true;
}
ss_phase = DEFAULT_SS_PHASE;
default_phase_start_time = dtime();
science_phase_start_time = 0;
if (m_bDefault_gfx_running && default_saver_start_time_in_science_phase) {
// Remember how long default graphics ran during science phase
default_saver_duration_in_science_phase += (dtime() - default_saver_start_time_in_science_phase);
}
default_saver_start_time_in_science_phase = 0;
}
}
// Time to switch to science graphics phase?
if ((ss_phase == DEFAULT_SS_PHASE) && m_bConnected && (m_fGFXSciencePeriod > 0)) {
if (default_phase_start_time &&
((dtime() - default_phase_start_time + default_saver_duration_in_science_phase)
> m_fGFXDefaultPeriod)) {
// BOINCTRACE(_T("CScreensaver::Ending Default phase: now=%f, default_phase_start_time=%f, default_saver_duration_in_science_phase=%f\n"),
// dtime(), default_phase_start_time, default_saver_duration_in_science_phase);
ss_phase = SCIENCE_SS_PHASE;
default_phase_start_time = 0;
default_saver_duration_in_science_phase = 0;
science_phase_start_time = dtime();
if (m_bDefault_gfx_running) {
default_saver_start_time_in_science_phase = science_phase_start_time;
}
switch_to_default_gfx = false;
}
}
// Core client suspended?
if (suspend_reason && !(suspend_reason & SUSPEND_REASON_CPU_THROTTLE)) {
SetError(TRUE, m_hrError); // No GFX App is running: show moving BOINC logo
if (m_bDefault_ss_exists && !m_bDefault_gfx_running) {
switch_to_default_gfx = true;
}
}
if (switch_to_default_gfx) {
if (m_bScience_gfx_running) {
if (m_hGraphicsApplication || previous_result_ptr) {
// use previous_result_ptr because graphics_app_result_ptr may no longer be valid
terminate_screensaver(m_hGraphicsApplication, previous_result_ptr);
if (m_hGraphicsApplication == 0) {
graphics_app_result_ptr = NULL;
m_bScience_gfx_running = false;
} else {
// HasProcessExited() test will clear m_hGraphicsApplication and graphics_app_result_ptr
}
previous_result_ptr = NULL;
}
} else {
if (!m_bDefault_gfx_running) {
switch_to_default_gfx = false;
retval = launch_default_screensaver(default_ss_dir_path, m_hGraphicsApplication);
if (retval) {
m_hGraphicsApplication = 0;
previous_result_ptr = NULL;
graphics_app_result_ptr = NULL;
m_bDefault_gfx_running = false;
SetError(TRUE, SCRAPPERR_CANTLAUNCHDEFAULTGFXAPP); // No GFX App is running: show moving BOINC logo
} else {
m_bDefault_gfx_running = true;
if (ss_phase == SCIENCE_SS_PHASE) {
default_saver_start_time_in_science_phase = dtime();
}
SetError(FALSE, m_hrError); // A GFX App is running: hide moving BOINC logo
}
}
}
}
if ((ss_phase == SCIENCE_SS_PHASE) && !switch_to_default_gfx) {
#if SIMULATE_NO_GRAPHICS /* FOR TESTING */
SetError(TRUE, m_hrError); // No GFX App is running: show moving BOINC logo
if (m_bDefault_ss_exists && !m_bDefault_gfx_running) {
switch_to_default_gfx = true;
}
#else /* NORMAL OPERATION */
if (m_bScience_gfx_running) {
// Is the current graphics app's associated task still running?
if ((m_hGraphicsApplication) || (graphics_app_result_ptr)) {
iResultCount = (int)results.results.size();
graphics_app_result_ptr = NULL;
// Find the current task in the new results vector (if it still exists)
for (iIndex = 0; iIndex < iResultCount; iIndex++) {
theResult = results.results.at(iIndex);
if (is_same_task(theResult, previous_result_ptr)) {
graphics_app_result_ptr = theResult;
previous_result = *theResult;
previous_result_ptr = &previous_result;
break;
}
}
// V6 graphics only: if worker application has stopped running, terminate_screensaver
if ((graphics_app_result_ptr == NULL) && (m_hGraphicsApplication != 0)) {
if (previous_result_ptr) {
BOINCTRACE(_T("CScreensaver::DataManagementProc - %s finished\n"),
previous_result.graphics_exec_path.c_str());
}
terminate_screensaver(m_hGraphicsApplication, previous_result_ptr);
previous_result_ptr = NULL;
if (m_hGraphicsApplication == 0) {
graphics_app_result_ptr = NULL;
m_bScience_gfx_running = false;
// Save previous_result and previous_result_ptr for get_random_graphics_app() call
} else {
// HasProcessExited() test will clear m_hGraphicsApplication and graphics_app_result_ptr
}
}
if (last_change_time && (m_fGFXChangePeriod > 0) && ((dtime() - last_change_time) > m_fGFXChangePeriod) ) {
if (count_active_graphic_apps(results, previous_result_ptr) > 0) {
if (previous_result_ptr) {
BOINCTRACE(_T("CScreensaver::DataManagementProc - time to change: %s / %s\n"),
previous_result.name.c_str(), previous_result.graphics_exec_path.c_str());
}
terminate_screensaver(m_hGraphicsApplication, graphics_app_result_ptr);
if (m_hGraphicsApplication == 0) {
graphics_app_result_ptr = NULL;
m_bScience_gfx_running = false;
// Save previous_result and previous_result_ptr for get_random_graphics_app() call
} else {
// HasProcessExited() test will clear m_hGraphicsApplication and graphics_app_result_ptr
}
}
last_change_time = dtime();
}
}
} // End if (m_bScience_gfx_running)
// If no current graphics app, pick an active task at random and launch its graphics app
if ((m_bDefault_gfx_running || (m_hGraphicsApplication == 0)) && (graphics_app_result_ptr == NULL)) {
graphics_app_result_ptr = get_random_graphics_app(results, previous_result_ptr);
previous_result_ptr = NULL;
if (graphics_app_result_ptr) {
if (m_bDefault_gfx_running) {
terminate_default_screensaver(m_hGraphicsApplication);
killing_default_gfx = true;
// Remember how long default graphics ran during science phase
if (default_saver_start_time_in_science_phase) {
default_saver_duration_in_science_phase += (dtime() - default_saver_start_time_in_science_phase);
//BOINCTRACE(_T("CScreensaver::During Science phase: now=%f, default_saver_start_time=%f, default_saver_duration=%f\n"),
// dtime(), default_saver_start_time_in_science_phase, default_saver_duration_in_science_phase);
}
default_saver_start_time_in_science_phase = 0;
// HasProcessExited() test will clear m_hGraphicsApplication and graphics_app_result_ptr
} else {
retval = launch_screensaver(graphics_app_result_ptr, m_hGraphicsApplication);
if (retval) {
m_hGraphicsApplication = 0;
previous_result_ptr = NULL;
graphics_app_result_ptr = NULL;
m_bScience_gfx_running = false;
} else {
SetError(FALSE, m_hrError); // A GFX App is running: hide moving BOINC logo
last_change_time = dtime();
m_bScience_gfx_running = true;
// Make a local copy of current result, since original pointer
// may have been freed by the time we perform later tests
previous_result = *graphics_app_result_ptr;
previous_result_ptr = &previous_result;
if (previous_result_ptr) {
BOINCTRACE(_T("CScreensaver::DataManagementProc - launching %s\n"),
previous_result.graphics_exec_path.c_str());
}
}
}
} else {
SetError(TRUE, m_hrError); // No GFX App is running: show moving BOINC logo
// We can't run a science graphics app, so run the default graphics if available
if (m_bDefault_ss_exists && !m_bDefault_gfx_running) {
switch_to_default_gfx = true;
}
} // End if no science graphics available
} // End if no current science graphics app is running
#endif // ! SIMULATE_NO_GRAPHICS
if (switch_to_default_gfx) {
switch_to_default_gfx = false;
if (!m_bDefault_gfx_running) {
retval = launch_default_screensaver(default_ss_dir_path, m_hGraphicsApplication);
if (retval) {
m_hGraphicsApplication = 0;
previous_result_ptr = NULL;
graphics_app_result_ptr = NULL;
m_bDefault_gfx_running = false;
SetError(TRUE, SCRAPPERR_CANTLAUNCHDEFAULTGFXAPP); // No GFX App is running: show BOINC logo
} else {
m_bDefault_gfx_running = true;
default_saver_start_time_in_science_phase = dtime();
SetError(FALSE, m_hrError); // A GFX App is running: hide moving BOINC logo
}
}
}
} // End if ((ss_phase == SCIENCE_SS_PHASE) && !switch_to_default_gfx)
// Is the graphics app still running?
if (m_hGraphicsApplication) {
if (HasProcessExited(m_hGraphicsApplication, exit_status)) {
// Something has happened to the previously selected screensaver
// application. Start a different one.
BOINCTRACE(_T("CScreensaver::DataManagementProc - Graphics application isn't running, start a new one.\n"));
if (m_bDefault_gfx_running) {
// If we were able to connect to core client but gfx app can't, don't use it.
BOINCTRACE(_T("CScreensaver::DataManagementProc - Default graphics application exited with code %d.\n"), exit_status);
if (!killing_default_gfx) { // If this is an unexpected exit
if (exit_status == DEFAULT_GFX_CANT_CONNECT) {
SetError(TRUE, SCRAPPERR_DEFAULTGFXAPPCANTCONNECT); // No GFX App is running: show moving BOINC logo
} else {
SetError(TRUE, SCRAPPERR_DEFAULTGFXAPPCRASHED); // No GFX App is running: show moving BOINC logo
}
m_bDefault_ss_exists = false;
ss_phase = SCIENCE_SS_PHASE;
}
killing_default_gfx = false;
}
SetError(TRUE, m_hrError); // No GFX App is running: show moving BOINC logo
m_hGraphicsApplication = 0;
graphics_app_result_ptr = NULL;
m_bDefault_gfx_running = false;
m_bScience_gfx_running = false;
continue;
}
}
} // end while(true)
}
#ifdef _WIN32
BOOL CScreensaver::HasProcessExited(HANDLE pid_handle, int &exitCode) {
unsigned long status = 1;
if (GetExitCodeProcess(pid_handle, &status)) {
if (status == STILL_ACTIVE) {
exitCode = 0;
return false;
}
}
exitCode = (int)status;
return true;
}
#else
bool CScreensaver::HasProcessExited(pid_t pid, int &exitCode) {
int status;
pid_t p;
p = waitpid(pid, &status, WNOHANG);
exitCode = WEXITSTATUS(status);
if (p == pid) return true; // process has exited
if (p == -1) return true; // PID doesn't exist
exitCode = 0;
return false;
}
#endif
void CScreensaver::GetDefaultDisplayPeriods(struct ss_periods &periods)
{
char* default_data_dir_path = NULL;
char buf[1024];
FILE* f;
MIOFILE mf;
periods.GFXDefaultPeriod = GFX_DEFAULT_PERIOD;
periods.GFXSciencePeriod = GFX_SCIENCE_PERIOD;
periods.GFXChangePeriod = GFX_CHANGE_PERIOD;
periods.Show_default_ss_first = false;
#ifdef __APPLE__
default_data_dir_path = "/Library/Application Support/BOINC Data";
#else
default_data_dir_path = (char*)m_strBOINCDataDirectory.c_str();
#endif
strlcpy(buf, default_data_dir_path, sizeof(buf));
strlcat(buf, PATH_SEPARATOR, sizeof(buf));
strlcat(buf, THE_SS_CONFIG_FILE, sizeof(buf));
f = boinc_fopen(buf, "r");
if (!f) return;
mf.init_file(f);
XML_PARSER xp(&mf);
while (mf.fgets(buf, sizeof(buf))) {
if (parse_bool(buf, "default_ss_first", periods.Show_default_ss_first)) continue;
if (parse_double(buf, "<default_gfx_duration>", periods.GFXDefaultPeriod)) continue;
if (parse_double(buf, "<science_gfx_duration>", periods.GFXSciencePeriod)) continue;
if (parse_double(buf, "<science_gfx_change_interval>", periods.GFXChangePeriod)) continue;
}
fclose(f);
BOINCTRACE(_T("CScreensaver::GetDefaultDisplayPeriods: m_bShow_default_ss_first=%d, m_fGFXDefaultPeriod=%f, m_fGFXSciencePeriod=%f, m_fGFXChangePeriod=%f\n"),
(int)periods.Show_default_ss_first, periods.GFXDefaultPeriod, periods.GFXSciencePeriod, periods.GFXChangePeriod);
}
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