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