+void Sys_Sleep(int microseconds)
+{
+ double t = 0;
+ if(sys_usenoclockbutbenchmark.integer)
+ {
+ if(microseconds)
+ {
+ double old_benchmark_time = benchmark_time;
+ benchmark_time += microseconds;
+ if(benchmark_time == old_benchmark_time)
+ Sys_Error("sys_usenoclockbutbenchmark cannot run any longer, sorry");
+ }
+ return;
+ }
+ if(sys_debugsleep.integer)
+ {
+ t = Sys_DirtyTime();
+ }
+ if(sys_supportsdlgetticks && sys_usesdldelay.integer)
+ {
+ Sys_SDL_Delay(microseconds / 1000);
+ }
+#if HAVE_SELECT
+ else
+ {
+ struct timeval tv;
+ tv.tv_sec = microseconds / 1000000;
+ tv.tv_usec = microseconds % 1000000;
+ select(0, NULL, NULL, NULL, &tv);
+ }
+#elif HAVE_USLEEP
+ else
+ {
+ usleep(microseconds);
+ }
+#elif HAVE_Sleep
+ else
+ {
+ Sleep(microseconds / 1000);
+ }
+#else
+ else
+ {
+ Sys_SDL_Delay(microseconds / 1000);
+ }
+#endif
+ if(sys_debugsleep.integer)
+ {
+ t = Sys_DirtyTime() - t;
+ Sys_PrintfToTerminal("%d %d # debugsleep\n", microseconds, (unsigned int)(t * 1000000));
+ }
+}
+
+void Sys_PrintfToTerminal(const char *fmt, ...)
+{
+ va_list argptr;
+ char msg[MAX_INPUTLINE];
+
+ va_start(argptr,fmt);
+ dpvsnprintf(msg,sizeof(msg),fmt,argptr);
+ va_end(argptr);
+
+ Sys_PrintToTerminal(msg);
+}
+
+#ifndef WIN32
+static const char *Sys_FindInPATH(const char *name, char namesep, const char *PATH, char pathsep, char *buf, size_t bufsize)
+{
+ const char *p = PATH;
+ const char *q;
+ if(p && name)
+ {
+ while((q = strchr(p, ':')))
+ {
+ dpsnprintf(buf, bufsize, "%.*s%c%s", (int)(q-p), p, namesep, name);
+ if(FS_SysFileExists(buf))
+ return buf;
+ p = q + 1;
+ }
+ if(!q) // none found - try the last item
+ {
+ dpsnprintf(buf, bufsize, "%s%c%s", p, namesep, name);
+ if(FS_SysFileExists(buf))
+ return buf;
+ }
+ }
+ return name;
+}
+#endif
+
+static const char *Sys_FindExecutableName(void)
+{
+#if defined(WIN32)
+ return com_argv[0];
+#else
+ static char exenamebuf[MAX_OSPATH+1];
+ ssize_t n = -1;
+#if defined(__FreeBSD__)
+ n = readlink("/proc/curproc/file", exenamebuf, sizeof(exenamebuf)-1);
+#elif defined(__linux__)
+ n = readlink("/proc/self/exe", exenamebuf, sizeof(exenamebuf)-1);
+#endif
+ if(n > 0 && (size_t)(n) < sizeof(exenamebuf))
+ {
+ exenamebuf[n] = 0;
+ return exenamebuf;
+ }
+ if(strchr(com_argv[0], '/'))
+ return com_argv[0]; // possibly a relative path
+ else
+ return Sys_FindInPATH(com_argv[0], '/', getenv("PATH"), ':', exenamebuf, sizeof(exenamebuf));
+#endif
+}
+
+void Sys_ProvideSelfFD(void)
+{
+ if(com_selffd != -1)
+ return;
+ com_selffd = FS_SysOpenFD(Sys_FindExecutableName(), "rb", false);
+}
+
+// for x86 cpus only... (x64 has SSE2_PRESENT)
+#if defined(SSE_POSSIBLE) && !defined(SSE2_PRESENT)
+// code from SDL, shortened as we can expect CPUID to work
+static int CPUID_Features(void)
+{
+ int features = 0;
+# if defined(__GNUC__) && defined(__i386__)
+ __asm__ (
+" movl %%ebx,%%edi\n"
+" xorl %%eax,%%eax \n"
+" incl %%eax \n"
+" cpuid # Get family/model/stepping/features\n"
+" movl %%edx,%0 \n"
+" movl %%edi,%%ebx\n"
+ : "=m" (features)
+ :
+ : "%eax", "%ecx", "%edx", "%edi"
+ );
+# elif (defined(_MSC_VER) && defined(_M_IX86)) || defined(__WATCOMC__)
+ __asm {
+ xor eax, eax
+ inc eax
+ cpuid ; Get family/model/stepping/features
+ mov features, edx
+ }
+# else
+# error SSE_POSSIBLE set but no CPUID implementation
+# endif
+ return features;
+}
+#endif
+
+#ifdef SSE_POSSIBLE
+qboolean Sys_HaveSSE(void)
+{
+ // COMMANDLINEOPTION: SSE: -nosse disables SSE support and detection
+ if(COM_CheckParm("-nosse"))
+ return false;
+#ifdef SSE_PRESENT
+ return true;
+#else
+ // COMMANDLINEOPTION: SSE: -forcesse enables SSE support and disables detection
+ if(COM_CheckParm("-forcesse") || COM_CheckParm("-forcesse2"))
+ return true;
+ if(CPUID_Features() & (1 << 25))
+ return true;
+ return false;
+#endif
+}
+
+qboolean Sys_HaveSSE2(void)
+{
+ // COMMANDLINEOPTION: SSE2: -nosse2 disables SSE2 support and detection
+ if(COM_CheckParm("-nosse") || COM_CheckParm("-nosse2"))
+ return false;
+#ifdef SSE2_PRESENT
+ return true;
+#else
+ // COMMANDLINEOPTION: SSE2: -forcesse2 enables SSE2 support and disables detection
+ if(COM_CheckParm("-forcesse2"))
+ return true;
+ if((CPUID_Features() & (3 << 25)) == (3 << 25)) // SSE is 1<<25, SSE2 is 1<<26
+ return true;
+ return false;
+#endif
+}
+#endif
+
+/// called to set process priority for dedicated servers
+#if defined(__linux__)
+#include <sys/resource.h>
+#include <errno.h>
+static int nicelevel;
+static qboolean nicepossible;
+static qboolean isnice;
+void Sys_InitProcessNice (void)
+{
+ struct rlimit lim;
+ nicepossible = false;
+ if(COM_CheckParm("-nonice"))
+ return;
+ errno = 0;
+ nicelevel = getpriority(PRIO_PROCESS, 0);
+ if(errno)
+ {
+ Con_Printf("Kernel does not support reading process priority - cannot use niceness\n");
+ return;
+ }
+ if(getrlimit(RLIMIT_NICE, &lim))
+ {
+ Con_Printf("Kernel does not support lowering nice level again - cannot use niceness\n");
+ return;
+ }
+ if(lim.rlim_cur != RLIM_INFINITY && nicelevel < (int) (20 - lim.rlim_cur))
+ {
+ Con_Printf("Current nice level is below the soft limit - cannot use niceness\n");
+ return;
+ }
+ nicepossible = true;
+ isnice = false;
+}
+void Sys_MakeProcessNice (void)
+{
+ if(!nicepossible)
+ return;
+ if(isnice)
+ return;
+ Con_DPrintf("Process is becoming 'nice'...\n");
+ if(setpriority(PRIO_PROCESS, 0, 19))
+ Con_Printf("Failed to raise nice level to %d\n", 19);
+ isnice = true;
+}
+void Sys_MakeProcessMean (void)
+{
+ if(!nicepossible)
+ return;
+ if(!isnice)
+ return;
+ Con_DPrintf("Process is becoming 'mean'...\n");
+ if(setpriority(PRIO_PROCESS, 0, nicelevel))
+ Con_Printf("Failed to lower nice level to %d\n", nicelevel);
+ isnice = false;
+}
+#else
+void Sys_InitProcessNice (void)
+{
+}
+void Sys_MakeProcessNice (void)
+{
+}
+void Sys_MakeProcessMean (void)
+{
+}
+#endif