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/* -*- C -*-
* $Id$
*/
#include <ruby.h>
#include "dl.h"
VALUE rb_cDLHandle;
void
dlhandle_free(struct dl_handle *dlhandle)
{
if( dlhandle->ptr && dlhandle->open && dlhandle->enable_close ){
dlclose(dlhandle->ptr);
}
}
VALUE
rb_dlhandle_close(VALUE self)
{
struct dl_handle *dlhandle;
Data_Get_Struct(self, struct dl_handle, dlhandle);
dlhandle->open = 0;
return INT2NUM(dlclose(dlhandle->ptr));
}
VALUE
rb_dlhandle_s_allocate(VALUE klass)
{
VALUE obj;
struct dl_handle *dlhandle;
obj = Data_Make_Struct(rb_cDLHandle, struct dl_handle, 0,
dlhandle_free, dlhandle);
dlhandle->ptr = 0;
dlhandle->open = 0;
dlhandle->enable_close = 0;
return obj;
}
VALUE
rb_dlhandle_initialize(int argc, VALUE argv[], VALUE self)
{
void *ptr;
struct dl_handle *dlhandle;
VALUE lib, flag;
char *clib;
int cflag;
const char *err;
switch( rb_scan_args(argc, argv, "02", &lib, &flag) ){
case 0:
clib = NULL;
cflag = RTLD_LAZY | RTLD_GLOBAL;
break;
case 1:
clib = NIL_P(lib) ? NULL : StringValuePtr(lib);
cflag = RTLD_LAZY | RTLD_GLOBAL;
break;
case 2:
clib = NIL_P(lib) ? NULL : StringValuePtr(lib);
cflag = NUM2INT(flag);
break;
default:
rb_bug("rb_dlhandle_new");
}
ptr = dlopen(clib, cflag);
#if defined(HAVE_DLERROR)
if( !ptr && (err = dlerror()) ){
rb_raise(rb_eDLError, "%s", err);
}
#else
if( !ptr ){
err = dlerror();
rb_raise(rb_eDLError, "%s", err);
}
#endif
Data_Get_Struct(self, struct dl_handle, dlhandle);
if( dlhandle->ptr && dlhandle->open && dlhandle->enable_close ){
dlclose(dlhandle->ptr);
}
dlhandle->ptr = ptr;
dlhandle->open = 1;
dlhandle->enable_close = 0;
if( rb_block_given_p() ){
rb_ensure(rb_yield, self, rb_dlhandle_close, self);
}
return Qnil;
}
VALUE
rb_dlhandle_enable_close(VALUE self)
{
struct dl_handle *dlhandle;
Data_Get_Struct(self, struct dl_handle, dlhandle);
dlhandle->enable_close = 1;
return Qnil;
}
VALUE
rb_dlhandle_disable_close(VALUE self)
{
struct dl_handle *dlhandle;
Data_Get_Struct(self, struct dl_handle, dlhandle);
dlhandle->enable_close = 0;
return Qnil;
}
VALUE
rb_dlhandle_to_i(VALUE self)
{
struct dl_handle *dlhandle;
Data_Get_Struct(self, struct dl_handle, dlhandle);
return PTR2NUM(dlhandle);
}
VALUE
rb_dlhandle_sym(VALUE self, VALUE sym)
{
void (*func)();
struct dl_handle *dlhandle;
void *handle;
const char *name;
const char *err;
int i;
#if defined(HAVE_DLERROR)
# define CHECK_DLERROR if( err = dlerror() ){ func = 0; }
#else
# define CHECK_DLERROR
#endif
rb_secure(2);
if( sym == Qnil ){
#if defined(RTLD_NEXT)
name = RTLD_NEXT;
#else
name = NULL;
#endif
}
else{
name = StringValuePtr(sym);
}
Data_Get_Struct(self, struct dl_handle, dlhandle);
if( ! dlhandle->open ){
rb_raise(rb_eDLError, "closed handle");
}
handle = dlhandle->ptr;
func = dlsym(handle, name);
CHECK_DLERROR;
if( !func ){
#if defined(__CYGWIN__) || defined(WIN32) || defined(__MINGW32__)
{
int len = strlen(name);
char *name_a = (char*)xmalloc(len+2);
strcpy(name_a, name);
name_a[len] = 'A';
name_a[len+1] = '\0';
func = dlsym(handle, name_a);
xfree(name_a);
CHECK_DLERROR;
if( !func ){
for( i = 0; i < 256; i += 4 ){
int len = strlen(name);
char *name_n = (char*)xmalloc(len+5);
sprintf(name_n, "%s@%d%c", name, i, 0);
func = dlsym(handle, name_n);
xfree(name_n);
CHECK_DLERROR;
if( func )
{
break;
}
}
CHECK_DLERROR;
if( !func ){
rb_raise(rb_eDLError, "unknown symbol \"%s\"", name);
}
}
}
#else
for( i = 0; i < 256; i += 4 ){
int len = strlen(name);
char *name_n = (char*)xmalloc(len+4);
sprintf(name_n, "%s@%d", name, i);
func = dlsym(handle, name_n);
xfree(name_n);
CHECK_DLERROR;
if( func ){
break;
}
}
CHECK_DLERROR;
if( !func ){
rb_raise(rb_eDLError, "unknown symbol \"%s\"", name);
}
#endif
}
return PTR2NUM(func);
}
void
Init_dlhandle()
{
rb_cDLHandle = rb_define_class_under(rb_mDL, "Handle", rb_cObject);
rb_define_alloc_func(rb_cDLHandle, rb_dlhandle_s_allocate);
rb_define_method(rb_cDLHandle, "initialize", rb_dlhandle_initialize, -1);
rb_define_method(rb_cDLHandle, "to_i", rb_dlhandle_to_i, 0);
rb_define_method(rb_cDLHandle, "close", rb_dlhandle_close, 0);
rb_define_method(rb_cDLHandle, "sym", rb_dlhandle_sym, 1);
rb_define_method(rb_cDLHandle, "[]", rb_dlhandle_sym, 1);
rb_define_method(rb_cDLHandle, "disable_close", rb_dlhandle_disable_close, 0);
rb_define_method(rb_cDLHandle, "enable_close", rb_dlhandle_enable_close, 0);
}
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