sys_shared.c

   1 #include "quakedef.h"
   2 # include <time.h>
   3 #ifndef WIN32
   4 # include <unistd.h>
   5 # include <fcntl.h>
   6 # include <dlfcn.h>
   7 #endif
   8
   9 static char sys_timestring[128];
  10 char *Sys_TimeString(const char *timeformat)
  11 {
  12         time_t mytime = time(NULL);
  13 #if _MSC_VER >= 1400
  14         struct tm mytm;
  15         localtime_s(&mytm, &mytime);
  16         strftime(sys_timestring, sizeof(sys_timestring), timeformat, &mytm);
  17 #else
  18         strftime(sys_timestring, sizeof(sys_timestring), timeformat, localtime(&mytime));
  19 #endif
  20         return sys_timestring;
  21 }
  22
  23
  24 extern qboolean host_shuttingdown;
  25 void Sys_Quit (int returnvalue)
  26 {
  27         if (COM_CheckParm("-profilegameonly"))
  28                 Sys_AllowProfiling(false);
  29         host_shuttingdown = true;
  30         Host_Shutdown();
  31         exit(returnvalue);
  32 }
  33
  34 void Sys_AllowProfiling(qboolean enable)
  35 {
  36 #if defined(__linux__) || defined(__FreeBSD__)
  37 int moncontrol(int);
  38         moncontrol(enable);
  39 #endif
  40 }
  41
  42
  43 /*
  44 ===============================================================================
  45
  46 DLL MANAGEMENT
  47
  48 ===============================================================================
  49 */
  50
  51 qboolean Sys_LoadLibrary (const char** dllnames, dllhandle_t* handle, const dllfunction_t *fcts)
  52 {
  53         const dllfunction_t *func;
  54         dllhandle_t dllhandle = 0;
  55         unsigned int i;
  56
  57         if (handle == NULL)
  58                 return false;
  59
  60 #ifndef WIN32
  61 #ifdef PREFER_PRELOAD
  62         dllhandle = dlopen(NULL, RTLD_LAZY | RTLD_GLOBAL);
  63         if(dllhandle)
  64         {
  65                 for (func = fcts; func && func->name != NULL; func++)
  66                         if (!(*func->funcvariable = (void *) Sys_GetProcAddress (dllhandle, func->name)))
  67                         {
  68                                 dlclose(dllhandle);
  69                                 goto notfound;
  70                         }
  71                 Con_Printf ("All of %s's functions were already linked in! Not loading dynamically...\n", dllnames[0]);
  72                 *handle = dllhandle;
  73                 return true;
  74         }
  75 notfound:
  76 #endif
  77 #endif
  78
  79         // Initializations
  80         for (func = fcts; func && func->name != NULL; func++)
  81                 *func->funcvariable = NULL;
  82
  83         // Try every possible name
  84         Con_Printf ("Trying to load library...");
  85         for (i = 0; dllnames[i] != NULL; i++)
  86         {
  87                 Con_Printf (" \"%s\"", dllnames[i]);
  88 #ifdef WIN32
  89                 dllhandle = LoadLibrary (dllnames[i]);
  90 #else
  91                 dllhandle = dlopen (dllnames[i], RTLD_LAZY | RTLD_GLOBAL);
  92 #endif
  93                 if (dllhandle)
  94                         break;
  95         }
  96
  97         // see if the names can be loaded relative to the executable path
  98         // (this is for Mac OSX which does not check next to the executable)
  99         if (!dllhandle && strrchr(com_argv[0], '/'))
 100         {
 101                 char path[MAX_OSPATH];
 102                 strlcpy(path, com_argv[0], sizeof(path));
 103                 strrchr(path, '/')[1] = 0;
 104                 for (i = 0; dllnames[i] != NULL; i++)
 105                 {
 106                         char temp[MAX_OSPATH];
 107                         strlcpy(temp, path, sizeof(temp));
 108                         strlcat(temp, dllnames[i], sizeof(temp));
 109                         Con_Printf (" \"%s\"", temp);
 110 #ifdef WIN32
 111                         dllhandle = LoadLibrary (temp);
 112 #else
 113                         dllhandle = dlopen (temp, RTLD_LAZY | RTLD_GLOBAL);
 114 #endif
 115                         if (dllhandle)
 116                                 break;
 117                 }
 118         }
 119
 120         // No DLL found
 121         if (! dllhandle)
 122         {
 123                 Con_Printf(" - failed.\n");
 124                 return false;
 125         }
 126
 127         Con_Printf(" - loaded.\n");
 128
 129         // Get the function adresses
 130         for (func = fcts; func && func->name != NULL; func++)
 131                 if (!(*func->funcvariable = (void *) Sys_GetProcAddress (dllhandle, func->name)))
 132                 {
 133                         Con_Printf ("Missing function \"%s\" - broken library!\n", func->name);
 134                         Sys_UnloadLibrary (&dllhandle);
 135                         return false;
 136                 }
 137
 138         *handle = dllhandle;
 139         return true;
 140 }
 141
 142 void Sys_UnloadLibrary (dllhandle_t* handle)
 143 {
 144         if (handle == NULL || *handle == NULL)
 145                 return;
 146
 147 #ifdef WIN32
 148         FreeLibrary (*handle);
 149 #else
 150         dlclose (*handle);
 151 #endif
 152
 153         *handle = NULL;
 154 }
 155
 156 void* Sys_GetProcAddress (dllhandle_t handle, const char* name)
 157 {
 158 #ifdef WIN32
 159         return (void *)GetProcAddress (handle, name);
 160 #else
 161         return (void *)dlsym (handle, name);
 162 #endif
 163 }
 164