sys_shared.c

   1 #ifdef WIN32
   2 # ifndef DONT_USE_SETDLLDIRECTORY
   3 #  define _WIN32_WINNT 0x0502
   4 # endif
   5 #endif
   6
   7 #include "quakedef.h"
   8 #include "taskqueue.h"
   9 #include "thread.h"
  10
  11 #define SUPPORTDLL
  12
  13 #ifdef WIN32
  14 # include <windows.h>
  15 # include <mmsystem.h> // timeGetTime
  16 # include <time.h> // localtime
  17 #ifdef _MSC_VER
  18 #pragma comment(lib, "winmm.lib")
  19 #endif
  20 #else
  21 # include <unistd.h>
  22 # include <fcntl.h>
  23 # include <sys/time.h>
  24 # include <time.h>
  25 # ifdef SUPPORTDLL
  26 #  include <dlfcn.h>
  27 # endif
  28 #endif
  29
  30 static char sys_timestring[128];
  31 char *Sys_TimeString(const char *timeformat)
  32 {
  33         time_t mytime = time(NULL);
  34 #if _MSC_VER >= 1400
  35         struct tm mytm;
  36         localtime_s(&mytm, &mytime);
  37         strftime(sys_timestring, sizeof(sys_timestring), timeformat, &mytm);
  38 #else
  39         strftime(sys_timestring, sizeof(sys_timestring), timeformat, localtime(&mytime));
  40 #endif
  41         return sys_timestring;
  42 }
  43
  44
  45 extern qboolean host_shuttingdown;
  46 void Sys_Quit (int returnvalue)
  47 {
  48         // Unlock mutexes because the quit command may jump directly here, causing a deadlock
  49         Cbuf_UnlockThreadMutex();
  50         SV_UnlockThreadMutex();
  51         TaskQueue_Frame(true);
  52
  53         if (COM_CheckParm("-profilegameonly"))
  54                 Sys_AllowProfiling(false);
  55         host_shuttingdown = true;
  56         Host_Shutdown();
  57         exit(returnvalue);
  58 }
  59
  60 #ifdef __cplusplus
  61 extern "C"
  62 #endif
  63 void Sys_AllowProfiling(qboolean enable)
  64 {
  65 #ifdef __ANDROID__
  66 #ifdef USE_PROFILER
  67         extern void monstartup(const char *libname);
  68         extern void moncleanup(void);
  69         if (enable)
  70                 monstartup("libmain.so");
  71         else
  72                 moncleanup();
  73 #endif
  74 #elif defined(__linux__) || defined(__FreeBSD__)
  75         extern int moncontrol(int);
  76         moncontrol(enable);
  77 #endif
  78 }
  79
  80
  81 /*
  82 ===============================================================================
  83
  84 DLL MANAGEMENT
  85
  86 ===============================================================================
  87 */
  88
  89 static qboolean Sys_LoadLibraryFunctions(dllhandle_t dllhandle, const dllfunction_t *fcts, qboolean complain, qboolean has_next)
  90 {
  91         const dllfunction_t *func;
  92         if(dllhandle)
  93         {
  94                 for (func = fcts; func && func->name != NULL; func++)
  95                         if (!(*func->funcvariable = (void *) Sys_GetProcAddress (dllhandle, func->name)))
  96                         {
  97                                 if(complain)
  98                                 {
  99                                         Con_DPrintf (" - missing function \"%s\" - broken library!", func->name);
 100                                         if(has_next)
 101                                                 Con_DPrintf("\nContinuing with");
 102                                 }
 103                                 goto notfound;
 104                         }
 105                 return true;
 106
 107         notfound:
 108                 for (func = fcts; func && func->name != NULL; func++)
 109                         *func->funcvariable = NULL;
 110         }
 111         return false;
 112 }
 113
 114 qboolean Sys_LoadLibrary (const char** dllnames, dllhandle_t* handle, const dllfunction_t *fcts)
 115 {
 116 #ifdef SUPPORTDLL
 117         const dllfunction_t *func;
 118         dllhandle_t dllhandle = 0;
 119         unsigned int i;
 120
 121         if (handle == NULL)
 122                 return false;
 123
 124 #ifndef WIN32
 125 #ifdef PREFER_PRELOAD
 126         dllhandle = dlopen(NULL, RTLD_LAZY | RTLD_GLOBAL);
 127         if(Sys_LoadLibraryFunctions(dllhandle, fcts, false, false))
 128         {
 129                 Con_DPrintf ("All of %s's functions were already linked in! Not loading dynamically...\n", dllnames[0]);
 130                 *handle = dllhandle;
 131                 return true;
 132         }
 133         else
 134                 Sys_UnloadLibrary(&dllhandle);
 135 notfound:
 136 #endif
 137 #endif
 138
 139         // Initializations
 140         for (func = fcts; func && func->name != NULL; func++)
 141                 *func->funcvariable = NULL;
 142
 143         // Try every possible name
 144         Con_DPrintf ("Trying to load library...");
 145         for (i = 0; dllnames[i] != NULL; i++)
 146         {
 147                 Con_DPrintf (" \"%s\"", dllnames[i]);
 148 #ifdef WIN32
 149 # ifndef DONT_USE_SETDLLDIRECTORY
 150 #  ifdef _WIN64
 151                 SetDllDirectory("bin64");
 152 #  else
 153                 SetDllDirectory("bin32");
 154 #  endif
 155 # endif
 156                 dllhandle = LoadLibrary (dllnames[i]);
 157                 // no need to unset this - we want ALL dlls to be loaded from there, anyway
 158 #else
 159                 dllhandle = dlopen (dllnames[i], RTLD_LAZY | RTLD_GLOBAL);
 160 #endif
 161                 if (Sys_LoadLibraryFunctions(dllhandle, fcts, true, (dllnames[i+1] != NULL) || (strrchr(com_argv[0], '/'))))
 162                         break;
 163                 else
 164                         Sys_UnloadLibrary (&dllhandle);
 165         }
 166
 167         // see if the names can be loaded relative to the executable path
 168         // (this is for Mac OSX which does not check next to the executable)
 169         if (!dllhandle && strrchr(com_argv[0], '/'))
 170         {
 171                 char path[MAX_OSPATH];
 172                 strlcpy(path, com_argv[0], sizeof(path));
 173                 strrchr(path, '/')[1] = 0;
 174                 for (i = 0; dllnames[i] != NULL; i++)
 175                 {
 176                         char temp[MAX_OSPATH];
 177                         strlcpy(temp, path, sizeof(temp));
 178                         strlcat(temp, dllnames[i], sizeof(temp));
 179                         Con_DPrintf (" \"%s\"", temp);
 180 #ifdef WIN32
 181                         dllhandle = LoadLibrary (temp);
 182 #else
 183                         dllhandle = dlopen (temp, RTLD_LAZY | RTLD_GLOBAL);
 184 #endif
 185                         if (Sys_LoadLibraryFunctions(dllhandle, fcts, true, dllnames[i+1] != NULL))
 186                                 break;
 187                         else
 188                                 Sys_UnloadLibrary (&dllhandle);
 189                 }
 190         }
 191
 192         // No DLL found
 193         if (! dllhandle)
 194         {
 195                 Con_DPrintf(" - failed.\n");
 196                 return false;
 197         }
 198
 199         Con_DPrintf(" - loaded.\n");
 200
 201         *handle = dllhandle;
 202         return true;
 203 #else
 204         return false;
 205 #endif
 206 }
 207
 208 void Sys_UnloadLibrary (dllhandle_t* handle)
 209 {
 210 #ifdef SUPPORTDLL
 211         if (handle == NULL || *handle == NULL)
 212                 return;
 213
 214 #ifdef WIN32
 215         FreeLibrary (*handle);
 216 #else
 217         dlclose (*handle);
 218 #endif
 219
 220         *handle = NULL;
 221 #endif
 222 }
 223
 224 void* Sys_GetProcAddress (dllhandle_t handle, const char* name)
 225 {
 226 #ifdef SUPPORTDLL
 227 #ifdef WIN32
 228         return (void *)GetProcAddress (handle, name);
 229 #else
 230         return (void *)dlsym (handle, name);
 231 #endif
 232 #else
 233         return NULL;
 234 #endif
 235 }
 236
 237 #ifdef WIN32
 238 # define HAVE_TIMEGETTIME 1
 239 # define HAVE_QUERYPERFORMANCECOUNTER 1
 240 # define HAVE_Sleep 1
 241 #endif
 242
 243 #ifndef WIN32
 244 #if defined(CLOCK_MONOTONIC) || defined(CLOCK_HIRES)
 245 # define HAVE_CLOCKGETTIME 1
 246 #endif
 247 // FIXME improve this check, manpage hints to DST_NONE
 248 # define HAVE_GETTIMEOFDAY 1
 249 #endif
 250
 251 #ifndef WIN32
 252 // on Win32, select() cannot be used with all three FD list args being NULL according to MSDN
 253 // (so much for POSIX...)
 254 # ifdef FD_SET
 255 #  define HAVE_SELECT 1
 256 # endif
 257 #endif
 258
 259 #ifndef WIN32
 260 // FIXME improve this check
 261 # define HAVE_USLEEP 1
 262 #endif
 263
 264 // this one is referenced elsewhere
 265 cvar_t sys_usenoclockbutbenchmark = {CVAR_SAVE, "sys_usenoclockbutbenchmark", "0", "don't use ANY real timing, and simulate a clock (for benchmarking); the game then runs as fast as possible. Run a QC mod with bots that does some stuff, then does a quit at the end, to benchmark a server. NEVER do this on a public server."};
 266
 267 // these are not
 268 static cvar_t sys_debugsleep = {0, "sys_debugsleep", "0", "write requested and attained sleep times to standard output, to be used with gnuplot"};
 269 static cvar_t sys_usesdlgetticks = {CVAR_SAVE, "sys_usesdlgetticks", "0", "use SDL_GetTicks() timer (less accurate, for debugging)"};
 270 static cvar_t sys_usesdldelay = {CVAR_SAVE, "sys_usesdldelay", "0", "use SDL_Delay() (less accurate, for debugging)"};
 271 #if HAVE_QUERYPERFORMANCECOUNTER
 272 static cvar_t sys_usequeryperformancecounter = {CVAR_SAVE, "sys_usequeryperformancecounter", "0", "use windows QueryPerformanceCounter timer (which has issues on multicore/multiprocessor machines and processors which are designed to conserve power) for timing rather than timeGetTime function (which has issues on some motherboards)"};
 273 #endif
 274 #if HAVE_CLOCKGETTIME
 275 static cvar_t sys_useclockgettime = {CVAR_SAVE, "sys_useclockgettime", "1", "use POSIX clock_gettime function (not adjusted by NTP on some older Linux kernels) for timing rather than gettimeofday (which has issues if the system time is stepped by ntpdate, or apparently on some Xen installations)"};
 276 #endif
 277
 278 static double benchmark_time; // actually always contains an integer amount of milliseconds, will eventually "overflow"
 279
 280 void Sys_Init_Commands (void)
 281 {
 282         Cvar_RegisterVariable(&sys_debugsleep);
 283         Cvar_RegisterVariable(&sys_usenoclockbutbenchmark);
 284 #if HAVE_TIMEGETTIME || HAVE_QUERYPERFORMANCECOUNTER || HAVE_CLOCKGETTIME || HAVE_GETTIMEOFDAY
 285         if(sys_supportsdlgetticks)
 286         {
 287                 Cvar_RegisterVariable(&sys_usesdlgetticks);
 288                 Cvar_RegisterVariable(&sys_usesdldelay);
 289         }
 290 #endif
 291 #if HAVE_QUERYPERFORMANCECOUNTER
 292         Cvar_RegisterVariable(&sys_usequeryperformancecounter);
 293 #endif
 294 #if HAVE_CLOCKGETTIME
 295         Cvar_RegisterVariable(&sys_useclockgettime);
 296 #endif
 297 }
 298
 299 double Sys_DirtyTime(void)
 300 {
 301         // first all the OPTIONAL timers
 302
 303         // benchmark timer (fake clock)
 304         if(sys_usenoclockbutbenchmark.integer)
 305         {
 306                 double old_benchmark_time = benchmark_time;
 307                 benchmark_time += 1;
 308                 if(benchmark_time == old_benchmark_time)
 309                         Sys_Error("sys_usenoclockbutbenchmark cannot run any longer, sorry");
 310                 return benchmark_time * 0.000001;
 311         }
 312 #if HAVE_QUERYPERFORMANCECOUNTER
 313         if (sys_usequeryperformancecounter.integer)
 314         {
 315                 // LadyHavoc: note to people modifying this code, DWORD is specifically defined as an unsigned 32bit number, therefore the 65536.0 * 65536.0 is fine.
 316                 // QueryPerformanceCounter
 317                 // platform:
 318                 // Windows 95/98/ME/NT/2000/XP
 319                 // features:
 320                 // very accurate (CPU cycles)
 321                 // known issues:
 322                 // does not necessarily match realtime too well (tends to get faster and faster in win98)
 323                 // wraps around occasionally on some platforms (depends on CPU speed and probably other unknown factors)
 324                 double timescale;
 325                 LARGE_INTEGER PerformanceFreq;
 326                 LARGE_INTEGER PerformanceCount;
 327
 328                 if (QueryPerformanceFrequency (&PerformanceFreq))
 329                 {
 330                         QueryPerformanceCounter (&PerformanceCount);
 331
 332                         #ifdef __BORLANDC__
 333                         timescale = 1.0 / ((double) PerformanceFreq.u.LowPart + (double) PerformanceFreq.u.HighPart * 65536.0 * 65536.0);
 334                         return ((double) PerformanceCount.u.LowPart + (double) PerformanceCount.u.HighPart * 65536.0 * 65536.0) * timescale;
 335                         #else
 336                         timescale = 1.0 / ((double) PerformanceFreq.LowPart + (double) PerformanceFreq.HighPart * 65536.0 * 65536.0);
 337                         return ((double) PerformanceCount.LowPart + (double) PerformanceCount.HighPart * 65536.0 * 65536.0) * timescale;
 338                         #endif
 339                 }
 340                 else
 341                 {
 342                         Con_Printf("No hardware timer available\n");
 343                         // fall back to other clock sources
 344                         Cvar_SetValueQuick(&sys_usequeryperformancecounter, false);
 345                 }
 346         }
 347 #endif
 348
 349 #if HAVE_CLOCKGETTIME
 350         if (sys_useclockgettime.integer)
 351         {
 352                 struct timespec ts;
 353 #  ifdef CLOCK_MONOTONIC
 354                 // linux
 355                 clock_gettime(CLOCK_MONOTONIC, &ts);
 356 #  else
 357                 // sunos
 358                 clock_gettime(CLOCK_HIGHRES, &ts);
 359 #  endif
 360                 return (double) ts.tv_sec + ts.tv_nsec / 1000000000.0;
 361         }
 362 #endif
 363
 364         // now all the FALLBACK timers
 365         if(sys_supportsdlgetticks && sys_usesdlgetticks.integer)
 366                 return (double) Sys_SDL_GetTicks() / 1000.0;
 367 #if HAVE_GETTIMEOFDAY
 368         {
 369                 struct timeval tp;
 370                 gettimeofday(&tp, NULL);
 371                 return (double) tp.tv_sec + tp.tv_usec / 1000000.0;
 372         }
 373 #elif HAVE_TIMEGETTIME
 374         {
 375                 static int firsttimegettime = true;
 376                 // timeGetTime
 377                 // platform:
 378                 // Windows 95/98/ME/NT/2000/XP
 379                 // features:
 380                 // reasonable accuracy (millisecond)
 381                 // issues:
 382                 // wraps around every 47 days or so (but this is non-fatal to us, odd times are rejected, only causes a one frame stutter)
 383
 384                 // make sure the timer is high precision, otherwise different versions of windows have varying accuracy
 385                 if (firsttimegettime)
 386                 {
 387                         timeBeginPeriod(1);
 388                         firsttimegettime = false;
 389                 }
 390
 391                 return (double) timeGetTime() / 1000.0;
 392         }
 393 #else
 394         // fallback for using the SDL timer if no other timer is available
 395         // this calls Sys_Error() if not linking against SDL
 396         return (double) Sys_SDL_GetTicks() / 1000.0;
 397 #endif
 398 }
 399
 400 void Sys_Sleep(int microseconds)
 401 {
 402         double t = 0;
 403         if(sys_usenoclockbutbenchmark.integer)
 404         {
 405                 if(microseconds)
 406                 {
 407                         double old_benchmark_time = benchmark_time;
 408                         benchmark_time += microseconds;
 409                         if(benchmark_time == old_benchmark_time)
 410                                 Sys_Error("sys_usenoclockbutbenchmark cannot run any longer, sorry");
 411                 }
 412                 return;
 413         }
 414         if(sys_debugsleep.integer)
 415         {
 416                 t = Sys_DirtyTime();
 417         }
 418         if(sys_supportsdlgetticks && sys_usesdldelay.integer)
 419         {
 420                 Sys_SDL_Delay(microseconds / 1000);
 421         }
 422 #if HAVE_SELECT
 423         else
 424         {
 425                 struct timeval tv;
 426                 tv.tv_sec = microseconds / 1000000;
 427                 tv.tv_usec = microseconds % 1000000;
 428                 select(0, NULL, NULL, NULL, &tv);
 429         }
 430 #elif HAVE_USLEEP
 431         else
 432         {
 433                 usleep(microseconds);
 434         }
 435 #elif HAVE_Sleep
 436         else
 437         {
 438                 Sleep(microseconds / 1000);
 439         }
 440 #else
 441         else
 442         {
 443                 Sys_SDL_Delay(microseconds / 1000);
 444         }
 445 #endif
 446         if(sys_debugsleep.integer)
 447         {
 448                 t = Sys_DirtyTime() - t;
 449                 Sys_PrintfToTerminal("%d %d # debugsleep\n", microseconds, (unsigned int)(t * 1000000));
 450         }
 451 }
 452
 453 void Sys_PrintfToTerminal(const char *fmt, ...)
 454 {
 455         va_list argptr;
 456         char msg[MAX_INPUTLINE];
 457
 458         va_start(argptr,fmt);
 459         dpvsnprintf(msg,sizeof(msg),fmt,argptr);
 460         va_end(argptr);
 461
 462         Sys_PrintToTerminal(msg);
 463 }
 464
 465 #ifndef WIN32
 466 static const char *Sys_FindInPATH(const char *name, char namesep, const char *PATH, char pathsep, char *buf, size_t bufsize)
 467 {
 468         const char *p = PATH;
 469         const char *q;
 470         if(p && name)
 471         {
 472                 while((q = strchr(p, ':')))
 473                 {
 474                         dpsnprintf(buf, bufsize, "%.*s%c%s", (int)(q-p), p, namesep, name);
 475                         if(FS_SysFileExists(buf))
 476                                 return buf;
 477                         p = q + 1;
 478                 }
 479                 if(!q) // none found - try the last item
 480                 {
 481                         dpsnprintf(buf, bufsize, "%s%c%s", p, namesep, name);
 482                         if(FS_SysFileExists(buf))
 483                                 return buf;
 484                 }
 485         }
 486         return name;
 487 }
 488 #endif
 489
 490 static const char *Sys_FindExecutableName(void)
 491 {
 492 #if defined(WIN32)
 493         return com_argv[0];
 494 #else
 495         static char exenamebuf[MAX_OSPATH+1];
 496         ssize_t n = -1;
 497 #if defined(__FreeBSD__)
 498         n = readlink("/proc/curproc/file", exenamebuf, sizeof(exenamebuf)-1);
 499 #elif defined(__linux__)
 500         n = readlink("/proc/self/exe", exenamebuf, sizeof(exenamebuf)-1);
 501 #endif
 502         if(n > 0 && (size_t)(n) < sizeof(exenamebuf))
 503         {
 504                 exenamebuf[n] = 0;
 505                 return exenamebuf;
 506         }
 507         if(strchr(com_argv[0], '/'))
 508                 return com_argv[0]; // possibly a relative path
 509         else
 510                 return Sys_FindInPATH(com_argv[0], '/', getenv("PATH"), ':', exenamebuf, sizeof(exenamebuf));
 511 #endif
 512 }
 513
 514 void Sys_ProvideSelfFD(void)
 515 {
 516         if(com_selffd != -1)
 517                 return;
 518         com_selffd = FS_SysOpenFD(Sys_FindExecutableName(), "rb", false);
 519 }
 520
 521 // for x86 cpus only...  (x64 has SSE2_PRESENT)
 522 #if defined(SSE_POSSIBLE) && !defined(SSE2_PRESENT)
 523 // code from SDL, shortened as we can expect CPUID to work
 524 static int CPUID_Features(void)
 525 {
 526         int features = 0;
 527 # if defined(__GNUC__) && defined(__i386__)
 528         __asm__ (
 529 "        movl    %%ebx,%%edi\n"
 530 "        xorl    %%eax,%%eax                                           \n"
 531 "        incl    %%eax                                                 \n"
 532 "        cpuid                       # Get family/model/stepping/features\n"
 533 "        movl    %%edx,%0                                              \n"
 534 "        movl    %%edi,%%ebx\n"
 535         : "=m" (features)
 536         :
 537         : "%eax", "%ecx", "%edx", "%edi"
 538         );
 539 # elif (defined(_MSC_VER) && defined(_M_IX86)) || defined(__WATCOMC__)
 540         __asm {
 541         xor     eax, eax
 542         inc     eax
 543         cpuid                       ; Get family/model/stepping/features
 544         mov     features, edx
 545         }
 546 # else
 547 #  error SSE_POSSIBLE set but no CPUID implementation
 548 # endif
 549         return features;
 550 }
 551 #endif
 552
 553 #ifdef SSE_POSSIBLE
 554 qboolean Sys_HaveSSE(void)
 555 {
 556         // COMMANDLINEOPTION: SSE: -nosse disables SSE support and detection
 557         if(COM_CheckParm("-nosse"))
 558                 return false;
 559 #ifdef SSE_PRESENT
 560         return true;
 561 #else
 562         // COMMANDLINEOPTION: SSE: -forcesse enables SSE support and disables detection
 563         if(COM_CheckParm("-forcesse") || COM_CheckParm("-forcesse2"))
 564                 return true;
 565         if(CPUID_Features() & (1 << 25))
 566                 return true;
 567         return false;
 568 #endif
 569 }
 570
 571 qboolean Sys_HaveSSE2(void)
 572 {
 573         // COMMANDLINEOPTION: SSE2: -nosse2 disables SSE2 support and detection
 574         if(COM_CheckParm("-nosse") || COM_CheckParm("-nosse2"))
 575                 return false;
 576 #ifdef SSE2_PRESENT
 577         return true;
 578 #else
 579         // COMMANDLINEOPTION: SSE2: -forcesse2 enables SSE2 support and disables detection
 580         if(COM_CheckParm("-forcesse2"))
 581                 return true;
 582         if((CPUID_Features() & (3 << 25)) == (3 << 25)) // SSE is 1<<25, SSE2 is 1<<26
 583                 return true;
 584         return false;
 585 #endif
 586 }
 587 #endif
 588
 589 /// called to set process priority for dedicated servers
 590 #if defined(__linux__)
 591 #include <sys/resource.h>
 592 #include <errno.h>
 593 static int nicelevel;
 594 static qboolean nicepossible;
 595 static qboolean isnice;
 596 void Sys_InitProcessNice (void)
 597 {
 598         struct rlimit lim;
 599         nicepossible = false;
 600         if(COM_CheckParm("-nonice"))
 601                 return;
 602         errno = 0;
 603         nicelevel = getpriority(PRIO_PROCESS, 0);
 604         if(errno)
 605         {
 606                 Con_Printf("Kernel does not support reading process priority - cannot use niceness\n");
 607                 return;
 608         }
 609         if(getrlimit(RLIMIT_NICE, &lim))
 610         {
 611                 Con_Printf("Kernel does not support lowering nice level again - cannot use niceness\n");
 612                 return;
 613         }
 614         if(lim.rlim_cur != RLIM_INFINITY && nicelevel < (int) (20 - lim.rlim_cur))
 615         {
 616                 Con_Printf("Current nice level is below the soft limit - cannot use niceness\n");
 617                 return;
 618         }
 619         nicepossible = true;
 620         isnice = false;
 621 }
 622 void Sys_MakeProcessNice (void)
 623 {
 624         if(!nicepossible)
 625                 return;
 626         if(isnice)
 627                 return;
 628         Con_DPrintf("Process is becoming 'nice'...\n");
 629         if(setpriority(PRIO_PROCESS, 0, 19))
 630                 Con_Printf("Failed to raise nice level to %d\n", 19);
 631         isnice = true;
 632 }
 633 void Sys_MakeProcessMean (void)
 634 {
 635         if(!nicepossible)
 636                 return;
 637         if(!isnice)
 638                 return;
 639         Con_DPrintf("Process is becoming 'mean'...\n");
 640         if(setpriority(PRIO_PROCESS, 0, nicelevel))
 641                 Con_Printf("Failed to lower nice level to %d\n", nicelevel);
 642         isnice = false;
 643 }
 644 #else
 645 void Sys_InitProcessNice (void)
 646 {
 647 }
 648 void Sys_MakeProcessNice (void)
 649 {
 650 }
 651 void Sys_MakeProcessMean (void)
 652 {
 653 }
 654 #endif