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/* Copyright (c) 1997-1999 Miller Puckette.
* For information on usage and redistribution, and for a DISCLAIMER OF ALL
* WARRANTIES, see the file, "LICENSE.txt," in this distribution. */
#ifdef HAVE_LIBDL
#include <dlfcn.h>
#endif
#ifdef HAVE_UNISTD_H
#include <stdlib.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#endif
#ifdef _WIN32
#include <io.h>
#include <windows.h>
#endif
#ifdef __APPLE__
#include <mach-o/dyld.h>
#endif
#include <string.h>
#include "m_pd.h"
#include "s_stuff.h"
#include <stdio.h>
#ifdef _MSC_VER /* This is only for Microsoft's compiler, not cygwin, e.g. */
#define snprintf sprintf_s
#endif
typedef void (*t_xxx)(void);
/* naming convention for externs. The names are kept distinct for those
who wich to make "fat" externs compiled for many platforms. Less specific
fallbacks are provided, primarily for back-compatibility; these suffice if
you are building a package which will run with a single set of compiled
objects. The specific name is the letter b, l, d, or m for BSD, linux,
darwin, or microsoft, followed by a more specific string, either "fat" for
a fat binary or an indication of the instruction set. */
#ifdef __FreeBSD__
static char sys_dllextent[] = ".b_i386", sys_dllextent2[] = ".pd_freebsd";
#elif defined(__linux__) || defined(__FreeBSD_kernel__) || defined(__GNU__)
# ifdef __x86_64__
static char sys_dllextent[] = ".l_ia64", sys_dllextent2[] = ".pd_linux";
# else
static char sys_dllextent[] = ".l_i386", sys_dllextent2[] = ".pd_linux";
# endif
#elif defined(__APPLE__)
# ifndef MACOSX3
static char sys_dllextent[] = ".pd_darwin", sys_dllextent2[] = ".pd_darwin";
# else
static char sys_dllextent[] = ".pd_darwin", sys_dllextent2[] = ".pd_darwin";
# endif
#elif defined(_WIN32) || defined(__CYGWIN__)
static char sys_dllextent[] = ".m_i386", sys_dllextent2[] = ".dll";
#elif defined(__ANDROID__)
static char sys_dllextent[] = ".l_arm", sys_dllextent2[] = ".pd_linux";
#endif
/* maintain list of loaded modules to avoid repeating loads */
typedef struct _loadedlist
{
struct _loadedlist *ll_next;
t_symbol *ll_name;
} t_loadlist;
static t_loadlist *sys_loaded;
int sys_onloadlist(char *classname) /* return true if already loaded */
{
t_symbol *s = gensym(classname);
t_loadlist *ll;
for (ll = sys_loaded; ll; ll = ll->ll_next)
if (ll->ll_name == s)
return (1);
return (0);
}
void sys_putonloadlist(char *classname) /* add to list of loaded modules */
{
t_loadlist *ll = (t_loadlist *)getbytes(sizeof(*ll));
ll->ll_name = gensym(classname);
ll->ll_next = sys_loaded;
sys_loaded = ll;
/* post("put on list %s", classname); */
}
void class_set_extern_dir(t_symbol *s);
static int sys_do_load_lib(t_canvas *canvas, char *objectname)
{
char symname[MAXPDSTRING], filename[MAXPDSTRING], dirbuf[MAXPDSTRING],
*classname, *nameptr, altsymname[MAXPDSTRING];
void *dlobj;
t_xxx makeout = NULL;
int i, hexmunge = 0, fd;
#ifdef _WIN32
HINSTANCE ntdll;
#endif
if (classname = strrchr(objectname, '/'))
classname++;
else classname = objectname;
if (sys_onloadlist(objectname))
{
logpost(NULL, 3, "%s: already loaded", objectname);
return (1);
}
for (i = 0, nameptr = classname; i < MAXPDSTRING-7 && *nameptr; nameptr++)
{
char c = *nameptr;
if ((c>='0' && c<='9') || (c>='A' && c<='Z')||
(c>='a' && c<='z' )|| c == '_')
{
symname[i] = c;
i++;
}
/* trailing tilde becomes "_tilde" */
else if (c == '~' && nameptr[1] == 0)
{
strcpy(symname+i, "_tilde");
i += strlen(symname+i);
}
else /* anything you can't put in a C symbol is sprintf'ed in hex */
{
sprintf(symname+i, "0x%02x", c);
i += strlen(symname+i);
hexmunge = 1;
}
}
symname[i] = 0;
if (hexmunge)
{
memmove(symname+6, symname, strlen(symname)+1);
strncpy(symname, "setup_", 6);
}
else strcat(symname, "_setup");
#if 0
fprintf(stderr, "lib: %s\n", classname);
#endif
/* try looking in the path for (objectname).(sys_dllextent) ... */
if ((fd = canvas_open(canvas, objectname, sys_dllextent,
dirbuf, &nameptr, MAXPDSTRING, 1)) >= 0)
goto gotone;
/* same, with the more generic sys_dllextent2 */
#ifndef __APPLE__
if ((fd = canvas_open(canvas, objectname, sys_dllextent2,
dirbuf, &nameptr, MAXPDSTRING, 1)) >= 0)
goto gotone;
#endif /* __APPLE__ */
/* next try (objectname)/(classname).(sys_dllextent) ... */
strncpy(filename, objectname, MAXPDSTRING);
filename[MAXPDSTRING-2] = 0;
strcat(filename, "/");
strncat(filename, classname, MAXPDSTRING-strlen(filename));
filename[MAXPDSTRING-1] = 0;
if ((fd = canvas_open(canvas, filename, sys_dllextent,
dirbuf, &nameptr, MAXPDSTRING, 1)) >= 0)
goto gotone;
#ifndef __APPLE__
if ((fd = canvas_open(canvas, filename, sys_dllextent2,
dirbuf, &nameptr, MAXPDSTRING, 1)) >= 0)
goto gotone;
#endif /* __APPLE__ */
return (0);
gotone:
close(fd);
class_set_extern_dir(gensym(dirbuf));
/* rebuild the absolute pathname */
strncpy(filename, dirbuf, MAXPDSTRING);
filename[MAXPDSTRING-2] = 0;
strcat(filename, "/");
strncat(filename, nameptr, MAXPDSTRING-strlen(filename));
filename[MAXPDSTRING-1] = 0;
#ifdef _WIN32
sys_bashfilename(filename, filename);
/* set the dirname as DllDirectory, meaning in the path for
loading other DLLs so that dependent libraries can be included
in the same folder as the external. SetDllDirectory() needs a
minimum supported version of Windows XP SP1 for
SetDllDirectory, so WINVER must be 0x0502 */
char dirname[MAXPDSTRING];
strncpy(dirname, filename, MAXPDSTRING);
char* s = strrchr(dirname, '\\');
char* basename = s;
if (s && *s)
*s = '\0';
if (!SetDllDirectory(dirname))
error("Could not set '%s' as DllDirectory(), '%s' might not load.",
dirname, basename);
/* now load the DLL for the external */
ntdll = LoadLibrary(filename);
if (!ntdll)
{
error("%s: couldn't load", filename);
class_set_extern_dir(&s_);
return (0);
}
makeout = (t_xxx)GetProcAddress(ntdll, symname);
if(!makeout)
makeout = (t_xxx)GetProcAddress(ntdll, "setup");
SetDllDirectory(NULL); /* reset DLL dir to nothing */
#elif defined HAVE_LIBDL
dlobj = dlopen(filename, RTLD_NOW | RTLD_GLOBAL);
if (!dlobj)
{
error("%s: %s", filename, dlerror());
class_set_extern_dir(&s_);
return (0);
}
makeout = (t_xxx)dlsym(dlobj, symname);
if(!makeout)
makeout = (t_xxx)dlsym(dlobj, "setup");
/* fprintf(stderr, "symbol %s\n", symname); */
#else
# warning "No dynamic loading mechanism specified, libdl or WIN32 required for loading externals!"
#endif
if (!makeout)
{
error("load_object: Symbol \"%s\" not found", symname);
class_set_extern_dir(&s_);
return 0;
}
(*makeout)();
class_set_extern_dir(&s_);
sys_putonloadlist(objectname);
return (1);
}
/* linked list of loaders */
typedef struct loader_queue {
loader_t loader;
struct loader_queue *next;
} loader_queue_t;
static loader_queue_t loaders = {sys_do_load_lib, NULL};
/* register class loader function */
void sys_register_loader(loader_t loader)
{
loader_queue_t *q = &loaders;
while (1)
{
if (q->loader == loader) /* already loaded - nothing to do */
return;
else if (q->next)
q = q->next;
else
{
q->next = (loader_queue_t *)getbytes(sizeof(loader_queue_t));
q->next->loader = loader;
q->next->next = NULL;
break;
}
}
}
int sys_load_lib(t_canvas *canvas, char *classname)
{
int dspstate = canvas_suspend_dsp();
int ok = 0;
loader_queue_t *q;
for(q = &loaders; q; q = q->next)
if (ok = q->loader(canvas, classname)) break;
canvas_resume_dsp(dspstate);
return ok;
}
int sys_run_scheduler(const char *externalschedlibname,
const char *sys_extraflagsstring)
{
typedef int (*t_externalschedlibmain)(const char *);
t_externalschedlibmain externalmainfunc;
char filename[MAXPDSTRING];
snprintf(filename, sizeof(filename), "%s%s", externalschedlibname,
sys_dllextent);
sys_bashfilename(filename, filename);
#ifdef _WIN32
{
HINSTANCE ntdll = LoadLibrary(filename);
if (!ntdll)
{
error("%s: couldn't load external scheduler lib ", filename);
return (1);
}
externalmainfunc =
(t_externalschedlibmain)GetProcAddress(ntdll, "main");
}
#elif defined HAVE_LIBDL
{
void *dlobj;
struct stat statbuf;
/* if first-choice file extent can't 'stat', go for second */
if (stat(filename, &statbuf) < 0)
{
snprintf(filename, sizeof(filename), "%s%s", externalschedlibname,
sys_dllextent2);
sys_bashfilename(filename, filename);
}
dlobj = dlopen(filename, RTLD_NOW | RTLD_GLOBAL);
if (!dlobj)
{
error("%s: %s", filename, dlerror());
fprintf(stderr, "dlopen failed for %s: %s\n", filename, dlerror());
return (1);
}
externalmainfunc = (t_externalschedlibmain)dlsym(dlobj,
"pd_extern_sched");
}
#else
return (0);
#endif
return((*externalmainfunc)(sys_extraflagsstring));
}