| 1 | /* Copyright (C) 1995,1996, 2000, 2001, 2003, 2006, 2008, 2009, 2010, 2011 Free Software Foundation, Inc. |
| 2 | * |
| 3 | * This library is free software; you can redistribute it and/or |
| 4 | * modify it under the terms of the GNU Lesser General Public License |
| 5 | * as published by the Free Software Foundation; either version 3 of |
| 6 | * the License, or (at your option) any later version. |
| 7 | * |
| 8 | * This library is distributed in the hope that it will be useful, but |
| 9 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
| 10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 11 | * Lesser General Public License for more details. |
| 12 | * |
| 13 | * You should have received a copy of the GNU Lesser General Public |
| 14 | * License along with this library; if not, write to the Free Software |
| 15 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
| 16 | * 02110-1301 USA |
| 17 | */ |
| 18 | |
| 19 | |
| 20 | \f |
| 21 | #ifdef HAVE_CONFIG_H |
| 22 | # include <config.h> |
| 23 | #endif |
| 24 | |
| 25 | #include "libguile/_scm.h" |
| 26 | #include "libguile/async.h" |
| 27 | #include "libguile/hashtab.h" |
| 28 | #include "libguile/alist.h" |
| 29 | #include "libguile/root.h" |
| 30 | #include "libguile/weaks.h" |
| 31 | |
| 32 | #include "libguile/objprop.h" |
| 33 | \f |
| 34 | |
| 35 | /* {Object Properties} |
| 36 | */ |
| 37 | |
| 38 | static SCM object_whash; |
| 39 | static scm_i_pthread_mutex_t whash_mutex = SCM_I_PTHREAD_MUTEX_INITIALIZER; |
| 40 | |
| 41 | SCM_DEFINE (scm_object_properties, "object-properties", 1, 0, 0, |
| 42 | (SCM obj), |
| 43 | "Return @var{obj}'s property list.") |
| 44 | #define FUNC_NAME s_scm_object_properties |
| 45 | { |
| 46 | SCM ret; |
| 47 | |
| 48 | scm_i_pthread_mutex_lock (&whash_mutex); |
| 49 | ret = scm_hashq_ref (object_whash, obj, SCM_EOL); |
| 50 | scm_i_pthread_mutex_unlock (&whash_mutex); |
| 51 | |
| 52 | return ret; |
| 53 | } |
| 54 | #undef FUNC_NAME |
| 55 | |
| 56 | |
| 57 | SCM_DEFINE (scm_set_object_properties_x, "set-object-properties!", 2, 0, 0, |
| 58 | (SCM obj, SCM alist), |
| 59 | "Set @var{obj}'s property list to @var{alist}.") |
| 60 | #define FUNC_NAME s_scm_set_object_properties_x |
| 61 | { |
| 62 | scm_i_pthread_mutex_lock (&whash_mutex); |
| 63 | scm_hashq_set_x (object_whash, obj, alist); |
| 64 | scm_i_pthread_mutex_unlock (&whash_mutex); |
| 65 | |
| 66 | return alist; |
| 67 | } |
| 68 | #undef FUNC_NAME |
| 69 | |
| 70 | SCM_DEFINE (scm_object_property, "object-property", 2, 0, 0, |
| 71 | (SCM obj, SCM key), |
| 72 | "Return the property of @var{obj} with name @var{key}.") |
| 73 | #define FUNC_NAME s_scm_object_property |
| 74 | { |
| 75 | SCM assoc; |
| 76 | assoc = scm_assq (key, scm_object_properties (obj)); |
| 77 | return (SCM_NIMP (assoc) ? SCM_CDR (assoc) : SCM_BOOL_F); |
| 78 | } |
| 79 | #undef FUNC_NAME |
| 80 | |
| 81 | SCM_DEFINE (scm_set_object_property_x, "set-object-property!", 3, 0, 0, |
| 82 | (SCM obj, SCM key, SCM value), |
| 83 | "In @var{obj}'s property list, set the property named @var{key}\n" |
| 84 | "to @var{value}.") |
| 85 | #define FUNC_NAME s_scm_set_object_property_x |
| 86 | { |
| 87 | SCM alist; |
| 88 | SCM assoc; |
| 89 | |
| 90 | scm_i_pthread_mutex_lock (&whash_mutex); |
| 91 | alist = scm_hashq_ref (object_whash, obj, SCM_EOL); |
| 92 | assoc = scm_assq (key, alist); |
| 93 | if (SCM_NIMP (assoc)) |
| 94 | SCM_SETCDR (assoc, value); |
| 95 | else |
| 96 | scm_hashq_set_x (object_whash, obj, scm_acons (key, value, alist)); |
| 97 | scm_i_pthread_mutex_unlock (&whash_mutex); |
| 98 | |
| 99 | return value; |
| 100 | } |
| 101 | #undef FUNC_NAME |
| 102 | |
| 103 | |
| 104 | void |
| 105 | scm_init_objprop () |
| 106 | { |
| 107 | object_whash = scm_make_weak_key_hash_table (SCM_UNDEFINED); |
| 108 | #include "libguile/objprop.x" |
| 109 | } |
| 110 | |
| 111 | |
| 112 | /* |
| 113 | Local Variables: |
| 114 | c-file-style: "gnu" |
| 115 | End: |
| 116 | */ |