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