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authorttate <ttate@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>2005-02-04 13:35:37 +0000
committerttate <ttate@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>2005-02-04 13:35:37 +0000
commitbda37095ca990568069aaf07dc6b3fa8ceebc327 (patch)
tree15043d94698579d6ab19544542479a42385cd1b5 /ext/dl/handle.c
parent4ae9132605dc7b0297bcda408ca7a2ad7de39d2f (diff)
added new files.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@7883 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
Diffstat (limited to 'ext/dl/handle.c')
-rw-r--r--ext/dl/handle.c200
1 files changed, 200 insertions, 0 deletions
diff --git a/ext/dl/handle.c b/ext/dl/handle.c
new file mode 100644
index 0000000000..7f5ce12168
--- /dev/null
+++ b/ext/dl/handle.c
@@ -0,0 +1,200 @@
+/* -*- 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, err);
+ }
+#else
+ if( !ptr ){
+ err = dlerror();
+ rb_raise(rb_eDLError, 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 sym_data *data;
+ struct dl_handle *dlhandle;
+ void *handle;
+ const char *name;
+ const char *err;
+
+ 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);
+#if defined(HAVE_DLERROR)
+ if( !func && (err = dlerror()) )
+#else
+ if( !func )
+#endif
+ {
+#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);
+#if defined(HAVE_DLERROR)
+ if( !func && (err = dlerror()) )
+#else
+ if( !func )
+#endif
+ {
+ rb_raise(rb_eDLError, "Unknown symbol \"%sA\".", name);
+ }
+ }
+#else
+ 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);
+}