-/* Copyright (C) 2010, 2011, 2012 Free Software Foundation, Inc.
+/* Copyright (C) 2010-2013 Free Software Foundation, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public License
SCM_SYMBOL (sym_unsigned_int, "unsigned-int");
SCM_SYMBOL (sym_unsigned_long, "unsigned-long");
SCM_SYMBOL (sym_size_t, "size_t");
+SCM_SYMBOL (sym_ssize_t, "ssize_t");
+SCM_SYMBOL (sym_ptrdiff_t, "ptrdiff_t");
/* that's for pointers, you know. */
SCM_SYMBOL (sym_asterisk, "*");
/* The cell representing the null pointer. */
static SCM null_pointer;
-#if SIZEOF_VOID_P == 4
-# define scm_to_uintptr scm_to_uint32
-# define scm_from_uintptr scm_from_uint32
-#elif SIZEOF_VOID_P == 8
-# define scm_to_uintptr scm_to_uint64
-# define scm_from_uintptr scm_from_uint64
-#else
-# error unsupported pointer size
-#endif
-
/* Raise a null pointer dereference error. */
static void
void *c_finalizer;
scm_t_uintptr c_address;
- c_address = scm_to_uintptr (address);
+ c_address = scm_to_uintptr_t (address);
if (SCM_UNBNDP (finalizer))
c_finalizer = NULL;
else
{
SCM_VALIDATE_POINTER (1, pointer);
- return scm_from_uintptr ((scm_t_uintptr) SCM_POINTER_VALUE (pointer));
+ return scm_from_uintptr_t ((scm_t_uintptr) SCM_POINTER_VALUE (pointer));
}
#undef FUNC_NAME
scm_i_pointer_print (SCM pointer, SCM port, scm_print_state *pstate)
{
scm_puts_unlocked ("#<pointer 0x", port);
- scm_uintprint (scm_to_uintptr (scm_pointer_address (pointer)), 16, port);
+ scm_uintprint (scm_to_uintptr_t (scm_pointer_address (pointer)), 16, port);
scm_putc_unlocked ('>', port);
}
"holds a pointer, return this pointer.")
#define FUNC_NAME s_scm_dereference_pointer
{
+ void **ptr;
+
SCM_VALIDATE_POINTER (1, pointer);
- return scm_from_pointer (* (void **) SCM_POINTER_VALUE (pointer), NULL);
+ ptr = SCM_POINTER_VALUE (pointer);
+ if (SCM_UNLIKELY (ptr == NULL))
+ null_pointer_error (FUNC_NAME);
+
+ return scm_from_pointer (*ptr, NULL);
}
#undef FUNC_NAME
\f
-/* Pre-generate trampolines for less than 10 arguments. */
+/* We support calling foreign functions with up to 100 arguments. */
-#ifdef WORDS_BIGENDIAN
-#define OBJCODE_HEADER 0, 0, 0, 8, 0, 0, 0, 40
-#define META_HEADER 0, 0, 0, 32, 0, 0, 0, 0
-#else
-#define OBJCODE_HEADER 8, 0, 0, 0, 40, 0, 0, 0
-#define META_HEADER 32, 0, 0, 0, 0, 0, 0, 0
-#endif
+#define CODE(nreq) \
+ SCM_PACK_OP_24 (assert_nargs_ee, nreq + 1), \
+ SCM_PACK_OP_12_12 (foreign_call, 0, 1)
-#define CODE(nreq) \
- OBJCODE_HEADER, \
- /* 0 */ scm_op_assert_nargs_ee, 0, nreq, /* assert number of args */ \
- /* 3 */ scm_op_object_ref, 0, /* push the pair with the cif and the function pointer */ \
- /* 5 */ scm_op_foreign_call, nreq, /* and call (will return value as well) */ \
- /* 7 */ scm_op_nop, \
- /* 8 */ META (3, 7, nreq)
-
-#define META(start, end, nreq) \
- META_HEADER, \
- /* 0 */ scm_op_make_eol, /* bindings */ \
- /* 1 */ scm_op_make_eol, /* sources */ \
- /* 2 */ scm_op_make_int8, start, scm_op_make_int8, end, /* arity: from ip N to ip N */ \
- /* 6 */ scm_op_make_int8, nreq, /* the arity is N required args */ \
- /* 8 */ scm_op_list, 0, 3, /* make a list of those 3 vals */ \
- /* 11 */ scm_op_list, 0, 1, /* and the arities will be a list of that one list */ \
- /* 14 */ scm_op_load_symbol, 0, 0, 4, 'n', 'a', 'm', 'e', /* `name' */ \
- /* 22 */ scm_op_object_ref, 1, /* the name from the object table */ \
- /* 24 */ scm_op_cons, /* make a pair for the properties */ \
- /* 25 */ scm_op_list, 0, 4, /* pack bindings, sources, and arities into list */ \
- /* 28 */ scm_op_return, /* and return */ \
- /* 29 */ scm_op_nop, scm_op_nop, scm_op_nop \
- /* 32 */
-
-static const struct
-{
- scm_t_uint64 dummy; /* ensure 8-byte alignment; perhaps there's a better way */
- const scm_t_uint8 bytes[10 * (sizeof (struct scm_objcode) + 8
- + sizeof (struct scm_objcode) + 32)];
-} raw_bytecode = {
- 0,
+#define CODE_10(n) \
+ CODE (n + 0), CODE (n + 1), CODE (n + 2), CODE (n + 3), CODE (n + 4), \
+ CODE (n + 5), CODE (n + 6), CODE (n + 7), CODE (n + 8), CODE (n + 9)
+
+static const scm_t_uint32 foreign_stub_code[] =
{
- CODE (0), CODE (1), CODE (2), CODE (3), CODE (4),
- CODE (5), CODE (6), CODE (7), CODE (8), CODE (9)
- }
-};
+ CODE_10 (0), CODE_10 (10), CODE_10 (20), CODE_10 (30), CODE_10 (40),
+ CODE_10 (50), CODE_10 (60), CODE_10 (70), CODE_10 (80), CODE_10 (90)
+ };
#undef CODE
-#undef META
-#undef OBJCODE_HEADER
-#undef META_HEADER
+#undef CODE_10
-/*
- (defun generate-objcode-cells (n)
- "Generate objcode cells for up to N arguments"
- (interactive "p")
- (let ((i 0))
- (while (< i n)
- (insert
- (format " { STATIC_OBJCODE_TAG, SCM_PACK (raw_bytecode.bytes + %d) },\n"
- (* (+ 4 4 8 4 4 32) i)))
- (insert " { SCM_BOOL_F, SCM_PACK (0) },\n")
- (setq i (1+ i)))))
-*/
-#define STATIC_OBJCODE_TAG \
- SCM_PACK (SCM_MAKE_OBJCODE_TAG (SCM_OBJCODE_TYPE_STATIC, 0))
+static const scm_t_uint32 *
+get_foreign_stub_code (unsigned int nargs)
+{
+ if (nargs >= 100)
+ scm_misc_error ("make-foreign-function", "args >= 100 currently unimplemented",
+ SCM_EOL);
-static const struct
+ return &foreign_stub_code[nargs * 2];
+}
+
+/* Given a foreign procedure, determine its minimum arity. */
+int
+scm_i_foreign_arity (SCM foreign, int *req, int *opt, int *rest)
{
- scm_t_uint64 dummy; /* alignment */
- scm_t_cell cells[10 * 2]; /* 10 double cells */
-} objcode_cells = {
- 0,
- /* C-u 1 0 M-x generate-objcode-cells RET */
- {
- { STATIC_OBJCODE_TAG, SCM_PACK (raw_bytecode.bytes + 0) },
- { SCM_BOOL_F, SCM_PACK (0) },
- { STATIC_OBJCODE_TAG, SCM_PACK (raw_bytecode.bytes + 56) },
- { SCM_BOOL_F, SCM_PACK (0) },
- { STATIC_OBJCODE_TAG, SCM_PACK (raw_bytecode.bytes + 112) },
- { SCM_BOOL_F, SCM_PACK (0) },
- { STATIC_OBJCODE_TAG, SCM_PACK (raw_bytecode.bytes + 168) },
- { SCM_BOOL_F, SCM_PACK (0) },
- { STATIC_OBJCODE_TAG, SCM_PACK (raw_bytecode.bytes + 224) },
- { SCM_BOOL_F, SCM_PACK (0) },
- { STATIC_OBJCODE_TAG, SCM_PACK (raw_bytecode.bytes + 280) },
- { SCM_BOOL_F, SCM_PACK (0) },
- { STATIC_OBJCODE_TAG, SCM_PACK (raw_bytecode.bytes + 336) },
- { SCM_BOOL_F, SCM_PACK (0) },
- { STATIC_OBJCODE_TAG, SCM_PACK (raw_bytecode.bytes + 392) },
- { SCM_BOOL_F, SCM_PACK (0) },
- { STATIC_OBJCODE_TAG, SCM_PACK (raw_bytecode.bytes + 448) },
- { SCM_BOOL_F, SCM_PACK (0) },
- { STATIC_OBJCODE_TAG, SCM_PACK (raw_bytecode.bytes + 504) },
- { SCM_BOOL_F, SCM_PACK (0) }
- }
-};
-
-static const SCM objcode_trampolines[10] = {
- SCM_PACK (objcode_cells.cells+0),
- SCM_PACK (objcode_cells.cells+2),
- SCM_PACK (objcode_cells.cells+4),
- SCM_PACK (objcode_cells.cells+6),
- SCM_PACK (objcode_cells.cells+8),
- SCM_PACK (objcode_cells.cells+10),
- SCM_PACK (objcode_cells.cells+12),
- SCM_PACK (objcode_cells.cells+14),
- SCM_PACK (objcode_cells.cells+16),
- SCM_PACK (objcode_cells.cells+18),
-};
+ const scm_t_uint32 *code = SCM_PROGRAM_CODE (foreign);
+
+ if (code < foreign_stub_code)
+ return 0;
+ if (code > (foreign_stub_code
+ + (sizeof(foreign_stub_code) / sizeof(scm_t_uint32))))
+ return 0;
+
+ *req = (code - foreign_stub_code) / 2;
+ *opt = 0;
+ *rest = 0;
+
+ return 1;
+}
static SCM
cif_to_procedure (SCM cif, SCM func_ptr)
{
ffi_cif *c_cif;
- unsigned int nargs;
- SCM objcode, table, ret;
+ SCM ret;
+ scm_t_bits nfree = 2;
+ scm_t_bits flags = SCM_F_PROGRAM_IS_FOREIGN;
c_cif = (ffi_cif *) SCM_POINTER_VALUE (cif);
- nargs = c_cif->nargs;
- if (nargs < 10)
- objcode = objcode_trampolines[nargs];
- else
- scm_misc_error ("make-foreign-function", "args >= 10 currently unimplemented",
- SCM_EOL);
-
- table = scm_c_make_vector (2, SCM_UNDEFINED);
- SCM_SIMPLE_VECTOR_SET (table, 0, scm_cons (cif, func_ptr));
- SCM_SIMPLE_VECTOR_SET (table, 1, SCM_BOOL_F); /* name */
- ret = scm_make_program (objcode, table, SCM_BOOL_F);
+ ret = scm_words (scm_tc7_program | (nfree << 16) | flags, nfree + 2);
+ SCM_SET_CELL_WORD_1 (ret, get_foreign_stub_code (c_cif->nargs));
+ SCM_PROGRAM_FREE_VARIABLE_SET (ret, 0, cif);
+ SCM_PROGRAM_FREE_VARIABLE_SET (ret, 1, func_ptr);
return ret;
}
scm_from_uint8 (SCM_FOREIGN_TYPE_UINT32)
#else
# error unsupported sizeof (size_t)
+#endif
+ );
+
+ scm_define (sym_ssize_t,
+#if SIZEOF_SIZE_T == 8
+ scm_from_uint8 (SCM_FOREIGN_TYPE_INT64)
+#elif SIZEOF_SIZE_T == 4
+ scm_from_uint8 (SCM_FOREIGN_TYPE_INT32)
+#else
+# error unsupported sizeof (ssize_t)
+#endif
+ );
+
+ scm_define (sym_ptrdiff_t,
+#if SCM_SIZEOF_SCM_T_PTRDIFF == 8
+ scm_from_uint8 (SCM_FOREIGN_TYPE_INT64)
+#elif SCM_SIZEOF_SCM_T_PTRDIFF == 4
+ scm_from_uint8 (SCM_FOREIGN_TYPE_INT32)
+#else
+# error unsupported sizeof (scm_t_ptrdiff)
#endif
);
HCoop / bpt / guile.git / blobdiff