sys_shared.c

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