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 #if defined(__linux__) || defined(__FreeBSD__)
  35 #ifdef __cplusplus
  36 extern "C"
  37 #endif
  38 int moncontrol(int);
  39 #endif
  40
  41 void Sys_AllowProfiling(qboolean enable)
  42 {
  43 #if defined(__linux__) || defined(__FreeBSD__)
  44         moncontrol(enable);
  45 #endif
  46 }
  47
  48
  49 /*
  50 ===============================================================================
  51
  52 DLL MANAGEMENT
  53
  54 ===============================================================================
  55 */
  56
  57 qboolean Sys_LoadLibrary (const char** dllnames, dllhandle_t* handle, const dllfunction_t *fcts)
  58 {
  59         const dllfunction_t *func;
  60         dllhandle_t dllhandle = 0;
  61         unsigned int i;
  62
  63         if (handle == NULL)
  64                 return false;
  65
  66 #ifndef WIN32
  67 #ifdef PREFER_PRELOAD
  68         dllhandle = dlopen(NULL, RTLD_LAZY | RTLD_GLOBAL);
  69         if(dllhandle)
  70         {
  71                 for (func = fcts; func && func->name != NULL; func++)
  72                         if (!(*func->funcvariable = (void *) Sys_GetProcAddress (dllhandle, func->name)))
  73                         {
  74                                 dlclose(dllhandle);
  75                                 goto notfound;
  76                         }
  77                 Con_Printf ("All of %s's functions were already linked in! Not loading dynamically...\n", dllnames[0]);
  78                 *handle = dllhandle;
  79                 return true;
  80         }
  81 notfound:
  82 #endif
  83 #endif
  84
  85         // Initializations
  86         for (func = fcts; func && func->name != NULL; func++)
  87                 *func->funcvariable = NULL;
  88
  89         // Try every possible name
  90         Con_Printf ("Trying to load library...");
  91         for (i = 0; dllnames[i] != NULL; i++)
  92         {
  93                 Con_Printf (" \"%s\"", dllnames[i]);
  94 #ifdef WIN32
  95                 dllhandle = LoadLibrary (dllnames[i]);
  96 #else
  97                 dllhandle = dlopen (dllnames[i], RTLD_LAZY | RTLD_GLOBAL);
  98 #endif
  99                 if (dllhandle)
 100                         break;
 101         }
 102
 103         // see if the names can be loaded relative to the executable path
 104         // (this is for Mac OSX which does not check next to the executable)
 105         if (!dllhandle && strrchr(com_argv[0], '/'))
 106         {
 107                 char path[MAX_OSPATH];
 108                 strlcpy(path, com_argv[0], sizeof(path));
 109                 strrchr(path, '/')[1] = 0;
 110                 for (i = 0; dllnames[i] != NULL; i++)
 111                 {
 112                         char temp[MAX_OSPATH];
 113                         strlcpy(temp, path, sizeof(temp));
 114                         strlcat(temp, dllnames[i], sizeof(temp));
 115                         Con_Printf (" \"%s\"", temp);
 116 #ifdef WIN32
 117                         dllhandle = LoadLibrary (temp);
 118 #else
 119                         dllhandle = dlopen (temp, RTLD_LAZY | RTLD_GLOBAL);
 120 #endif
 121                         if (dllhandle)
 122                                 break;
 123                 }
 124         }
 125
 126         // No DLL found
 127         if (! dllhandle)
 128         {
 129                 Con_Printf(" - failed.\n");
 130                 return false;
 131         }
 132
 133         Con_Printf(" - loaded.\n");
 134
 135         // Get the function adresses
 136         for (func = fcts; func && func->name != NULL; func++)
 137                 if (!(*func->funcvariable = (void *) Sys_GetProcAddress (dllhandle, func->name)))
 138                 {
 139                         Con_Printf ("Missing function \"%s\" - broken library!\n", func->name);
 140                         Sys_UnloadLibrary (&dllhandle);
 141                         return false;
 142                 }
 143
 144         *handle = dllhandle;
 145         return true;
 146 }
 147
 148 void Sys_UnloadLibrary (dllhandle_t* handle)
 149 {
 150         if (handle == NULL || *handle == NULL)
 151                 return;
 152
 153 #ifdef WIN32
 154         FreeLibrary (*handle);
 155 #else
 156         dlclose (*handle);
 157 #endif
 158
 159         *handle = NULL;
 160 }
 161
 162 void* Sys_GetProcAddress (dllhandle_t handle, const char* name)
 163 {
 164 #ifdef WIN32
 165         return (void *)GetProcAddress (handle, name);
 166 #else
 167         return (void *)dlsym (handle, name);
 168 #endif
 169 }
 170