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