| 1 | ;; Common Lisp bindings for GTK+ v2.x |
| 2 | ;; Copyright 1999-2006 Espen S. Johnsen <espen@users.sf.net> |
| 3 | ;; |
| 4 | ;; Permission is hereby granted, free of charge, to any person obtaining |
| 5 | ;; a copy of this software and associated documentation files (the |
| 6 | ;; "Software"), to deal in the Software without restriction, including |
| 7 | ;; without limitation the rights to use, copy, modify, merge, publish, |
| 8 | ;; distribute, sublicense, and/or sell copies of the Software, and to |
| 9 | ;; permit persons to whom the Software is furnished to do so, subject to |
| 10 | ;; the following conditions: |
| 11 | ;; |
| 12 | ;; The above copyright notice and this permission notice shall be |
| 13 | ;; included in all copies or substantial portions of the Software. |
| 14 | ;; |
| 15 | ;; THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
| 16 | ;; EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
| 17 | ;; MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. |
| 18 | ;; IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY |
| 19 | ;; CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, |
| 20 | ;; TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE |
| 21 | ;; SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
| 22 | |
| 23 | ;; $Id: memory.lisp,v 1.4 2007-06-02 07:26:23 espen Exp $ |
| 24 | |
| 25 | |
| 26 | (in-package "GFFI") |
| 27 | |
| 28 | |
| 29 | (defun make-pointer (address) |
| 30 | #+(or cmu sbcl)(int-sap address) |
| 31 | #+clisp(ffi:unsigned-foreign-address address) |
| 32 | #-(or cmu sbcl clisp)address) |
| 33 | |
| 34 | (defun pointer-address (pointer) |
| 35 | #+(or cmu sbcl)(sap-int pointer) |
| 36 | #+clisp(ffi:foreign-address-unsigned pointer) |
| 37 | #-(or cmu sbcl clisp)pointer) |
| 38 | |
| 39 | (defun null-pointer-p (pointer) |
| 40 | #+(or cmu sbcl)(zerop (sap-int pointer)) |
| 41 | #+clisp(or (not pointer) (zerop (pointer-address pointer))) |
| 42 | #-(or cmu sbcl clisp)(zerop pointer)) |
| 43 | |
| 44 | (defun pointer= (pointer1 pointer2) |
| 45 | #+(or cmu sbcl)(sap= pointer1 pointer2) |
| 46 | #+clisp(= (pointer-address pointer1) (pointer-address pointer2)) |
| 47 | #-(or cmu sbcl clisp)(= pointer1 pointer2)) |
| 48 | |
| 49 | (defun pointer+ (pointer offset) |
| 50 | #+(or cmu sbcl)(sap+ pointer offset) |
| 51 | #+clisp(make-pointer (+ (pointer-address pointer) offset)) |
| 52 | #-(or cmu sbcl clisp)(+ pointer offset)) |
| 53 | |
| 54 | (defun ref-pointer (location &optional (offset 0)) |
| 55 | #+(or cmu sbcl)(sap-ref-sap location offset) |
| 56 | #+clisp(ffi:memory-as location 'ffi:c-pointer offset)) |
| 57 | |
| 58 | (defun (setf ref-pointer) (pointer location &optional (offset 0)) |
| 59 | (setf |
| 60 | #+(or cmu sbcl)(sap-ref-sap location offset) |
| 61 | #+clisp(ffi:memory-as location 'ffi:c-pointer offset) |
| 62 | pointer)) |
| 63 | |
| 64 | (defun ref-byte (location &optional (offset 0)) |
| 65 | #+(or cmu sbcl)(sap-ref-8 location offset) |
| 66 | #+clisp(ffi:memory-as location 'ffi:uchar offset)) |
| 67 | |
| 68 | (defun (setf ref-byte) (byte location &optional (offset 0)) |
| 69 | (setf |
| 70 | #+(or cmu sbcl)(sap-ref-8 location offset) |
| 71 | #+clisp(ffi:memory-as location 'ffi:uchar offset) |
| 72 | byte)) |
| 73 | |
| 74 | (defun ref-int-32 (location &optional (offset 0)) |
| 75 | #+(or cmu sbcl)(signed-sap-ref-32 location offset) |
| 76 | #+clisp(ffi:memory-as location 'ffi:sint32 offset)) |
| 77 | |
| 78 | (defun (setf ref-int-32) (value location &optional (offset 0)) |
| 79 | (setf |
| 80 | #+(or cmu sbcl)(signed-sap-ref-32 location offset) |
| 81 | #+clisp(ffi:memory-as location 'ffi:sint32 offset) |
| 82 | value)) |
| 83 | |
| 84 | (defun ref-uint-32 (location &optional (offset 0)) |
| 85 | #+(or cmu sbcl)(sap-ref-32 location offset) |
| 86 | #+clisp(ffi:memory-as location 'ffi:uint32 offset)) |
| 87 | |
| 88 | (defun (setf ref-uint-32) (value location &optional (offset 0)) |
| 89 | (setf |
| 90 | #+(or cmu sbcl)(sap-ref-32 location offset) |
| 91 | #+clisp(ffi:memory-as location 'ffi:uint32 offset) |
| 92 | value)) |
| 93 | |
| 94 | (defun ref-single-float (location &optional (offset 0)) |
| 95 | #+(or cmu sbcl)(sap-ref-single location offset) |
| 96 | #+clisp(ffi:memory-as location 'single-float offset)) |
| 97 | |
| 98 | (defun (setf ref-single-float) (value location &optional (offset 0)) |
| 99 | (setf |
| 100 | #+(or cmu sbcl)(sap-ref-single location offset) |
| 101 | #+clisp(ffi:memory-as location 'single-float offset) |
| 102 | value)) |
| 103 | |
| 104 | (defun ref-double-float (location &optional (offset 0)) |
| 105 | #+(or cmu sbcl)(sap-ref-double location offset) |
| 106 | #+clisp(ffi:memory-as location 'double-float offset)) |
| 107 | |
| 108 | (defun (setf ref-double-float) (value location &optional (offset 0)) |
| 109 | (setf |
| 110 | #+(or cmu sbcl)(sap-ref-double location offset) |
| 111 | #+clisp(ffi:memory-as location 'double-float offset) |
| 112 | value)) |
| 113 | |
| 114 | |
| 115 | |
| 116 | (defparameter *memory-allocator* nil) |
| 117 | (defparameter *memory-deallocator* nil) |
| 118 | |
| 119 | (defun allocate-memory (size) |
| 120 | (if *memory-allocator* |
| 121 | (funcall *memory-allocator* size) |
| 122 | (error "Memory allocator not set"))) |
| 123 | (declaim (ftype (function (integer) system-area-pointer) allocate-memory)) |
| 124 | |
| 125 | (defun deallocate-memory (location) |
| 126 | (if *memory-deallocator* |
| 127 | (funcall *memory-deallocator* location) |
| 128 | (warn "Memory deallocator not set"))) |
| 129 | |
| 130 | (defun copy-memory (from length &optional (to (allocate-memory length))) |
| 131 | #+cmu(system-area-copy from 0 to 0 (* 8 length)) |
| 132 | #+sbcl(system-area-ub8-copy from 0 to 0 length) |
| 133 | #-(or cmu sbcl) |
| 134 | (loop |
| 135 | for offset below length |
| 136 | do (setf (ref-byte to offset) (ref-byte from offset))) |
| 137 | to) |
| 138 | |
| 139 | (defun clear-memory (from length &optional (offset 0)) |
| 140 | #+sbcl(system-area-ub8-fill 0 from offset length) |
| 141 | #-sbcl |
| 142 | (loop |
| 143 | repeat length |
| 144 | for byte-offset from offset |
| 145 | do (setf (ref-byte from byte-offset) 0))) |
| 146 | |
| 147 | (defun memory-clear-p (from length &optional (offset 0)) |
| 148 | (loop |
| 149 | repeat length |
| 150 | for byte-offset from offset |
| 151 | unless (zerop (ref-byte from byte-offset)) |
| 152 | do (return-from memory-clear-p nil)) |
| 153 | t) |
| 154 | |
| 155 | (defmacro with-memory ((var size) &body body) |
| 156 | #-clisp |
| 157 | (if (and #+(or cmu sbcl)t (constantp size)) |
| 158 | (let ((memory (make-symbol "MEMORY")) |
| 159 | (size (eval size))) |
| 160 | `(with-alien ((,memory (array #+sbcl(sb-alien:unsigned 8) #+cmu(alien:unsigned 8) ,size))) |
| 161 | (let ((,var (alien-sap ,memory))) |
| 162 | (clear-memory ,var ,size) |
| 163 | ,@body))) |
| 164 | `(let ((,var (allocate-memory ,size))) |
| 165 | (unwind-protect |
| 166 | (progn ,@body) |
| 167 | (deallocate-memory ,var)))) |
| 168 | #+clisp |
| 169 | (let ((memory (make-symbol "MEMORY"))) |
| 170 | `(ffi:with-foreign-object (,memory `(ffi:c-array ffi:uint8 ,,size)) |
| 171 | (let ((,var (ffi:foreign-address ,memory))) |
| 172 | ,@body)))) |
| 173 | |
| 174 | (defmacro with-pointer ((var &optional (pointer '(make-pointer 0))) &body body) |
| 175 | "Binds POINTER to VAR in a way which makes it possible to pass the location of VAR to in foreign function call." |
| 176 | #+(or cmu sbcl) |
| 177 | `(with-alien ((,var system-area-pointer ,pointer)) |
| 178 | ,@body) |
| 179 | #+clisp |
| 180 | `(ffi:with-c-var (,var `ffi:c-pointer ,pointer) |
| 181 | ,@body)) |
| 182 | |
| 183 | |
| 184 | #+sbcl |
| 185 | (progn |
| 186 | (defun sb-sizeof-bits (type) |
| 187 | (sb-alien-internals:alien-type-bits |
| 188 | (sb-alien-internals:parse-alien-type type nil))) |
| 189 | |
| 190 | (defun sb-sizeof (type) |
| 191 | (/ (sb-sizeof-bits type) 8)) |
| 192 | |
| 193 | (defun sb-alignment (type) |
| 194 | (/ (sb-alien-internals:alien-type-alignment |
| 195 | (sb-alien-internals:parse-alien-type type nil)) |
| 196 | 8))) |