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Diffstat (limited to 'ext/fiddle/function.c')
-rw-r--r--ext/fiddle/function.c366
1 files changed, 271 insertions, 95 deletions
diff --git a/ext/fiddle/function.c b/ext/fiddle/function.c
index 8e280567db..274d181d17 100644
--- a/ext/fiddle/function.c
+++ b/ext/fiddle/function.c
@@ -1,6 +1,8 @@
#include <fiddle.h>
#include <ruby/thread.h>
+#include <stdbool.h>
+
#ifdef PRIsVALUE
# define RB_OBJ_CLASSNAME(obj) rb_obj_class(obj)
# define RB_OBJ_STRING(obj) (obj)
@@ -19,21 +21,21 @@ VALUE cFiddleFunction;
#define Check_Max_Args_Long(name, len) \
Check_Max_Args_(name, len, "l")
#define Check_Max_Args_(name, len, fmt) \
- if ((size_t)(len) < MAX_ARGS) { \
- /* OK */ \
- } \
- else { \
- rb_raise(rb_eTypeError, \
- name" is so large that it can cause integer overflow (%"fmt"d)", \
- (len)); \
- }
+ do { \
+ if ((size_t)(len) >= MAX_ARGS) { \
+ rb_raise(rb_eTypeError, \
+ "%s is so large " \
+ "that it can cause integer overflow (%"fmt"d)", \
+ (name), (len)); \
+ } \
+ } while (0)
static void
deallocate(void *p)
{
- ffi_cif *ptr = p;
- if (ptr->arg_types) xfree(ptr->arg_types);
- xfree(ptr);
+ ffi_cif *cif = p;
+ if (cif->arg_types) xfree(cif->arg_types);
+ xfree(cif);
}
static size_t
@@ -75,72 +77,114 @@ rb_fiddle_new_function(VALUE address, VALUE arg_types, VALUE ret_type)
return rb_class_new_instance(3, argv, cFiddleFunction);
}
-static int
-parse_keyword_arg_i(VALUE key, VALUE value, VALUE self)
+static VALUE
+normalize_argument_types(const char *name,
+ VALUE arg_types,
+ bool *is_variadic)
{
- if (key == ID2SYM(rb_intern("name"))) {
- rb_iv_set(self, "@name", value);
- } else {
- rb_raise(rb_eArgError, "unknown keyword: %"PRIsVALUE,
- RB_OBJ_STRING(key));
+ VALUE normalized_arg_types;
+ int i;
+ int n_arg_types;
+ *is_variadic = false;
+
+ Check_Type(arg_types, T_ARRAY);
+ n_arg_types = RARRAY_LENINT(arg_types);
+ Check_Max_Args(name, n_arg_types);
+
+ normalized_arg_types = rb_ary_new_capa(n_arg_types);
+ for (i = 0; i < n_arg_types; i++) {
+ VALUE arg_type = RARRAY_AREF(arg_types, i);
+ int c_arg_type;
+ arg_type = rb_fiddle_type_ensure(arg_type);
+ c_arg_type = NUM2INT(arg_type);
+ if (c_arg_type == TYPE_VARIADIC) {
+ if (i != n_arg_types - 1) {
+ rb_raise(rb_eArgError,
+ "Fiddle::TYPE_VARIADIC must be the last argument type: "
+ "%"PRIsVALUE,
+ arg_types);
+ }
+ *is_variadic = true;
+ break;
+ }
+ else {
+ (void)INT2FFI_TYPE(c_arg_type); /* raise */
+ }
+ rb_ary_push(normalized_arg_types, INT2FIX(c_arg_type));
}
- return ST_CONTINUE;
+
+ /* freeze to prevent inconsistency at calling #to_int later */
+ OBJ_FREEZE(normalized_arg_types);
+ return normalized_arg_types;
}
static VALUE
initialize(int argc, VALUE argv[], VALUE self)
{
ffi_cif * cif;
- ffi_type **arg_types, *rtype;
- ffi_status result;
- VALUE ptr, args, ret_type, abi, kwds, ary;
- int i, len;
- int nabi;
+ VALUE ptr, arg_types, ret_type, abi, kwargs;
+ VALUE name = Qnil;
+ VALUE need_gvl = Qfalse;
+ int c_ret_type;
+ bool is_variadic = false;
+ ffi_abi c_ffi_abi;
void *cfunc;
- rb_scan_args(argc, argv, "31:", &ptr, &args, &ret_type, &abi, &kwds);
+ rb_scan_args(argc, argv, "31:", &ptr, &arg_types, &ret_type, &abi, &kwargs);
+ rb_iv_set(self, "@closure", ptr);
+
+ if (!NIL_P(kwargs)) {
+ enum {
+ kw_name,
+ kw_need_gvl,
+ kw_max_,
+ };
+ static ID kw[kw_max_];
+ VALUE args[kw_max_];
+ if (!kw[0]) {
+ kw[kw_name] = rb_intern_const("name");
+ kw[kw_need_gvl] = rb_intern_const("need_gvl");
+ }
+ rb_get_kwargs(kwargs, kw, 0, kw_max_, args);
+ if (args[kw_name] != Qundef) {
+ name = args[kw_name];
+ }
+ if (args[kw_need_gvl] != Qundef) {
+ need_gvl = args[kw_need_gvl];
+ }
+ }
+ rb_iv_set(self, "@name", name);
+ rb_iv_set(self, "@need_gvl", need_gvl);
+
ptr = rb_Integer(ptr);
cfunc = NUM2PTR(ptr);
PTR2NUM(cfunc);
- nabi = NIL_P(abi) ? FFI_DEFAULT_ABI : NUM2INT(abi);
- abi = INT2FIX(nabi);
- i = NUM2INT(ret_type);
- rtype = INT2FFI_TYPE(i);
- ret_type = INT2FIX(i);
-
- Check_Type(args, T_ARRAY);
- len = RARRAY_LENINT(args);
- Check_Max_Args("args", len);
- ary = rb_ary_subseq(args, 0, len);
- for (i = 0; i < RARRAY_LEN(args); i++) {
- VALUE a = RARRAY_PTR(args)[i];
- int type = NUM2INT(a);
- (void)INT2FFI_TYPE(type); /* raise */
- if (INT2FIX(type) != a) rb_ary_store(ary, i, INT2FIX(type));
+ c_ffi_abi = NIL_P(abi) ? FFI_DEFAULT_ABI : NUM2INT(abi);
+ abi = INT2FIX(c_ffi_abi);
+ ret_type = rb_fiddle_type_ensure(ret_type);
+ c_ret_type = NUM2INT(ret_type);
+ (void)INT2FFI_TYPE(c_ret_type); /* raise */
+ ret_type = INT2FIX(c_ret_type);
+
+ arg_types = normalize_argument_types("argument types",
+ arg_types,
+ &is_variadic);
+#ifndef HAVE_FFI_PREP_CIF_VAR
+ if (is_variadic) {
+ rb_raise(rb_eNotImpError,
+ "ffi_prep_cif_var() is required in libffi "
+ "for variadic arguments");
}
- OBJ_FREEZE(ary);
+#endif
rb_iv_set(self, "@ptr", ptr);
- rb_iv_set(self, "@args", args);
+ rb_iv_set(self, "@argument_types", arg_types);
rb_iv_set(self, "@return_type", ret_type);
rb_iv_set(self, "@abi", abi);
-
- if (!NIL_P(kwds)) rb_hash_foreach(kwds, parse_keyword_arg_i, self);
+ rb_iv_set(self, "@is_variadic", is_variadic ? Qtrue : Qfalse);
TypedData_Get_Struct(self, ffi_cif, &function_data_type, cif);
-
- arg_types = xcalloc(len + 1, sizeof(ffi_type *));
-
- for (i = 0; i < RARRAY_LEN(args); i++) {
- int type = NUM2INT(RARRAY_AREF(args, i));
- arg_types[i] = INT2FFI_TYPE(type);
- }
- arg_types[len] = NULL;
-
- result = ffi_prep_cif(cif, nabi, len, rtype, arg_types);
-
- if (result)
- rb_raise(rb_eRuntimeError, "error creating CIF %d", result);
+ cif->arg_types = NULL;
return self;
}
@@ -167,61 +211,182 @@ function_call(int argc, VALUE argv[], VALUE self)
{
struct nogvl_ffi_call_args args = { 0 };
fiddle_generic *generic_args;
- VALUE cfunc, types, cPointer;
+ VALUE cfunc;
+ VALUE abi;
+ VALUE arg_types;
+ VALUE cPointer;
+ VALUE is_variadic;
+ VALUE need_gvl;
+ int n_arg_types;
+ int n_fixed_args = 0;
+ int n_call_args = 0;
int i;
+ int i_call;
+ VALUE converted_args = Qnil;
VALUE alloc_buffer = 0;
cfunc = rb_iv_get(self, "@ptr");
- types = rb_iv_get(self, "@args");
+ abi = rb_iv_get(self, "@abi");
+ arg_types = rb_iv_get(self, "@argument_types");
cPointer = rb_const_get(mFiddle, rb_intern("Pointer"));
-
- Check_Max_Args("number of arguments", argc);
- if (argc != (i = RARRAY_LENINT(types))) {
- rb_error_arity(argc, i, i);
+ is_variadic = rb_iv_get(self, "@is_variadic");
+ need_gvl = rb_iv_get(self, "@need_gvl");
+
+ n_arg_types = RARRAY_LENINT(arg_types);
+ n_fixed_args = n_arg_types;
+ if (RTEST(is_variadic)) {
+ if (argc < n_arg_types) {
+ rb_error_arity(argc, n_arg_types, UNLIMITED_ARGUMENTS);
+ }
+ if (((argc - n_arg_types) % 2) != 0) {
+ rb_raise(rb_eArgError,
+ "variadic arguments must be type and value pairs: "
+ "%"PRIsVALUE,
+ rb_ary_new_from_values(argc, argv));
+ }
+ n_call_args = n_arg_types + ((argc - n_arg_types) / 2);
}
+ else {
+ if (argc != n_arg_types) {
+ rb_error_arity(argc, n_arg_types, n_arg_types);
+ }
+ n_call_args = n_arg_types;
+ }
+ Check_Max_Args("the number of arguments", n_call_args);
TypedData_Get_Struct(self, ffi_cif, &function_data_type, args.cif);
- if (rb_safe_level() >= 1) {
- for (i = 0; i < argc; i++) {
- VALUE src = argv[i];
- if (OBJ_TAINTED(src)) {
- rb_raise(rb_eSecurityError, "tainted parameter not allowed");
- }
- }
+ if (is_variadic && args.cif->arg_types) {
+ xfree(args.cif->arg_types);
+ args.cif->arg_types = NULL;
+ }
+
+ if (!args.cif->arg_types) {
+ VALUE fixed_arg_types = arg_types;
+ VALUE return_type;
+ int c_return_type;
+ ffi_type *ffi_return_type;
+ ffi_type **ffi_arg_types;
+ ffi_status result;
+
+ arg_types = rb_ary_dup(fixed_arg_types);
+ for (i = n_fixed_args; i < argc; i += 2) {
+ VALUE arg_type = argv[i];
+ int c_arg_type;
+ arg_type = rb_fiddle_type_ensure(arg_type);
+ c_arg_type = NUM2INT(arg_type);
+ (void)INT2FFI_TYPE(c_arg_type); /* raise */
+ rb_ary_push(arg_types, INT2FIX(c_arg_type));
+ }
+
+ return_type = rb_iv_get(self, "@return_type");
+ c_return_type = FIX2INT(return_type);
+ ffi_return_type = INT2FFI_TYPE(c_return_type);
+
+ ffi_arg_types = xcalloc(n_call_args + 1, sizeof(ffi_type *));
+ for (i_call = 0; i_call < n_call_args; i_call++) {
+ VALUE arg_type;
+ int c_arg_type;
+ arg_type = RARRAY_AREF(arg_types, i_call);
+ c_arg_type = FIX2INT(arg_type);
+ ffi_arg_types[i_call] = INT2FFI_TYPE(c_arg_type);
+ }
+ ffi_arg_types[i_call] = NULL;
+
+ if (is_variadic) {
+#ifdef HAVE_FFI_PREP_CIF_VAR
+ result = ffi_prep_cif_var(args.cif,
+ FIX2INT(abi),
+ n_fixed_args,
+ n_call_args,
+ ffi_return_type,
+ ffi_arg_types);
+#else
+ /* This code is never used because ffi_prep_cif_var()
+ * availability check is done in #initialize. */
+ result = FFI_BAD_TYPEDEF;
+#endif
+ }
+ else {
+ result = ffi_prep_cif(args.cif,
+ FIX2INT(abi),
+ n_call_args,
+ ffi_return_type,
+ ffi_arg_types);
+ }
+ if (result != FFI_OK) {
+ xfree(ffi_arg_types);
+ args.cif->arg_types = NULL;
+ rb_raise(rb_eRuntimeError, "error creating CIF %d", result);
+ }
}
generic_args = ALLOCV(alloc_buffer,
- (size_t)(argc + 1) * sizeof(void *) + (size_t)argc * sizeof(fiddle_generic));
+ sizeof(fiddle_generic) * n_call_args +
+ sizeof(void *) * (n_call_args + 1));
args.values = (void **)((char *)generic_args +
- (size_t)argc * sizeof(fiddle_generic));
-
- for (i = 0; i < argc; i++) {
- VALUE type = RARRAY_AREF(types, i);
- VALUE src = argv[i];
- int argtype = FIX2INT(type);
-
- if (argtype == TYPE_VOIDP) {
- if(NIL_P(src)) {
- src = INT2FIX(0);
- } else if(cPointer != CLASS_OF(src)) {
- src = rb_funcall(cPointer, rb_intern("[]"), 1, src);
- }
- src = rb_Integer(src);
- }
-
- VALUE2GENERIC(argtype, src, &generic_args[i]);
- args.values[i] = (void *)&generic_args[i];
+ sizeof(fiddle_generic) * n_call_args);
+
+ for (i = 0, i_call = 0;
+ i < argc && i_call < n_call_args;
+ i++, i_call++) {
+ VALUE arg_type;
+ int c_arg_type;
+ VALUE original_src;
+ VALUE src;
+ arg_type = RARRAY_AREF(arg_types, i_call);
+ c_arg_type = FIX2INT(arg_type);
+ if (i >= n_fixed_args) {
+ i++;
+ }
+ src = argv[i];
+
+ if (c_arg_type == TYPE_VOIDP) {
+ if (NIL_P(src)) {
+ src = INT2FIX(0);
+ }
+ else if (cPointer != CLASS_OF(src)) {
+ src = rb_funcall(cPointer, rb_intern("[]"), 1, src);
+ if (NIL_P(converted_args)) {
+ converted_args = rb_ary_new();
+ }
+ rb_ary_push(converted_args, src);
+ }
+ src = rb_Integer(src);
+ }
+
+ original_src = src;
+ VALUE2GENERIC(c_arg_type, src, &generic_args[i_call]);
+ if (src != original_src) {
+ if (NIL_P(converted_args)) {
+ converted_args = rb_ary_new();
+ }
+ rb_ary_push(converted_args, src);
+ }
+ args.values[i_call] = (void *)&generic_args[i_call];
}
- args.values[argc] = NULL;
- args.fn = NUM2PTR(cfunc);
+ args.values[i_call] = NULL;
+ args.fn = (void(*)(void))NUM2PTR(cfunc);
- (void)rb_thread_call_without_gvl(nogvl_ffi_call, &args, 0, 0);
+ if (RTEST(need_gvl)) {
+ ffi_call(args.cif, args.fn, &(args.retval), args.values);
+ }
+ else {
+ (void)rb_thread_call_without_gvl(nogvl_ffi_call, &args, 0, 0);
+ }
- rb_funcall(mFiddle, rb_intern("last_error="), 1, INT2NUM(errno));
+ {
+ int errno_keep = errno;
#if defined(_WIN32)
- rb_funcall(mFiddle, rb_intern("win32_last_error="), 1, INT2NUM(errno));
+ DWORD error = WSAGetLastError();
+ int socket_error = WSAGetLastError();
+ rb_funcall(mFiddle, rb_intern("win32_last_error="), 1,
+ ULONG2NUM(error));
+ rb_funcall(mFiddle, rb_intern("win32_last_socket_error="), 1,
+ INT2NUM(socket_error));
#endif
+ rb_funcall(mFiddle, rb_intern("last_error="), 1, INT2NUM(errno_keep));
+ }
ALLOCV_END(alloc_buffer);
@@ -294,6 +459,10 @@ Init_fiddle_function(void)
* Caller must ensure the underlying function is called in a
* thread-safe manner if running in a multi-threaded process.
*
+ * Note that it is not thread-safe to use this method to
+ * directly or indirectly call many Ruby C-extension APIs unless
+ * you don't pass +need_gvl: true+ to Fiddle::Function#new.
+ *
* For an example see Fiddle::Function
*
*/
@@ -301,13 +470,20 @@ Init_fiddle_function(void)
/*
* Document-method: new
- * call-seq: new(ptr, args, ret_type, abi = DEFAULT)
+ * call-seq: new(ptr,
+ * args,
+ * ret_type,
+ * abi = DEFAULT,
+ * name: nil,
+ * need_gvl: false)
*
* Constructs a Function object.
* * +ptr+ is a referenced function, of a Fiddle::Handle
* * +args+ is an Array of arguments, passed to the +ptr+ function
* * +ret_type+ is the return type of the function
* * +abi+ is the ABI of the function
+ * * +name+ is the name of the function
+ * * +need_gvl+ is whether GVL is needed to call the function
*
*/
rb_define_method(cFiddleFunction, "initialize", initialize, -1);
generated by cgit v1.2.3 (git 2.25.1) at 2026-06-06 06:23:42 +0000