1 /* dynar - a generic dynamic array */
3 /* Copyright (c) 2004, 2005, 2006, 2007, 2009, 2010. The SimGrid Team.
4 * All rights reserved. */
6 /* This program is free software; you can redistribute it and/or modify it
7 * under the terms of the license (GNU LGPL) which comes with this package. */
12 #include <string.h> /* memcpy */
14 #include "xbt/misc.h" /* SG_BEGIN_DECL */
15 #include "xbt/function_types.h"
19 /** @addtogroup XBT_dynar
20 * @brief DynArr are dynamically sized vector which may contain any type of variables.
22 * These are the SimGrid version of the dynamically size arrays, which all C programmer recode one day or another.
24 * For performance concerns, the content of DynArr must be homogeneous (in
25 * contrary to dictionnaries -- see the \ref XBT_dict section). You thus
26 * have to provide the function which will be used to free the content at
27 * structure creation (of type void_f_ppvoid_t or void_f_pvoid_t).
29 * \section XBT_dynar_exscal Example with scalar
30 * \dontinclude dynar.c
37 * \until end_of_traversal
40 * \until xbt_dynar_free
42 * \section XBT_dynar_exptr Example with pointed data
44 * \skip test_dynar_string
52 * \skip end_of_doxygen
56 /** @defgroup XBT_dynar_cons Dynar constructor and destructor
61 /** \brief Dynar data type (opaque type) */
62 typedef struct xbt_dynar_s *xbt_dynar_t;
65 XBT_PUBLIC(xbt_dynar_t) xbt_dynar_new(const unsigned long elm_size,
66 void_f_pvoid_t const free_f);
67 XBT_PUBLIC(xbt_dynar_t) xbt_dynar_new_sync(const unsigned long elm_size,
68 void_f_pvoid_t const free_f);
69 XBT_INLINE XBT_PUBLIC(void) xbt_dynar_free(xbt_dynar_t * dynar);
70 XBT_PUBLIC(void) xbt_dynar_free_voidp(void *dynar);
71 XBT_PUBLIC(void) xbt_dynar_free_container(xbt_dynar_t * dynar);
73 XBT_INLINE XBT_PUBLIC(unsigned long) xbt_dynar_length(const xbt_dynar_t
75 XBT_INLINE XBT_PUBLIC(int) xbt_dynar_is_empty(const xbt_dynar_t dynar);
76 XBT_PUBLIC(void) xbt_dynar_reset(xbt_dynar_t const dynar);
77 XBT_PUBLIC(void) xbt_dynar_shrink(xbt_dynar_t dynar, int empty_slots);
79 XBT_PUBLIC(void) xbt_dynar_dump(xbt_dynar_t dynar);
82 /** @defgroup XBT_dynar_array Dynar as a regular array
88 XBT_PUBLIC(void) xbt_dynar_get_cpy(const xbt_dynar_t dynar,
89 const unsigned long idx,
92 XBT_PUBLIC(void) xbt_dynar_set(xbt_dynar_t dynar, const int idx,
94 XBT_PUBLIC(void) xbt_dynar_replace(xbt_dynar_t dynar,
95 const unsigned long idx,
98 XBT_PUBLIC(void) xbt_dynar_insert_at(xbt_dynar_t const dynar,
99 const int idx, const void *src);
100 XBT_PUBLIC(void) xbt_dynar_remove_at(xbt_dynar_t const dynar,
101 const int idx, void *const dst);
103 XBT_PUBLIC(unsigned int) xbt_dynar_search(xbt_dynar_t const dynar,
105 XBT_PUBLIC(int) xbt_dynar_member(xbt_dynar_t const dynar, void *elem);
106 XBT_PUBLIC(void) xbt_dynar_sort(xbt_dynar_t const dynar,
107 int_f_cpvoid_cpvoid_t compar_fn);
108 XBT_INLINE XBT_PUBLIC(int) xbt_dynar_compare(xbt_dynar_t d1, xbt_dynar_t d2,
109 int(*compar)(const void *, const void *));
112 /** @defgroup XBT_dynar_perl Perl-like use of dynars
118 XBT_INLINE XBT_PUBLIC(void) xbt_dynar_push(xbt_dynar_t const dynar,
120 XBT_INLINE XBT_PUBLIC(void) xbt_dynar_pop(xbt_dynar_t const dynar,
122 XBT_PUBLIC(void) xbt_dynar_unshift(xbt_dynar_t const dynar,
124 XBT_PUBLIC(void) xbt_dynar_shift(xbt_dynar_t const dynar, void *const dst);
125 XBT_PUBLIC(void) xbt_dynar_map(const xbt_dynar_t dynar,
126 void_f_pvoid_t const op);
129 /** @defgroup XBT_dynar_ctn Direct manipulation to the dynars content
132 * Those functions do not retrieve the content, but only their address.
137 XBT_INLINE XBT_PUBLIC(void *) xbt_dynar_get_ptr(const xbt_dynar_t dynar,
138 const unsigned long idx);
139 XBT_PUBLIC(void *) xbt_dynar_set_at_ptr(const xbt_dynar_t dynar,
140 const unsigned long idx);
141 XBT_PUBLIC(void *) xbt_dynar_insert_at_ptr(xbt_dynar_t const dynar,
143 XBT_PUBLIC(void *) xbt_dynar_push_ptr(xbt_dynar_t const dynar);
144 XBT_PUBLIC(void *) xbt_dynar_pop_ptr(xbt_dynar_t const dynar);
147 /** @defgroup XBT_dynar_speed Speed optimized access to dynars of scalars
150 * While the other functions use a memcpy to retrieve the content into the
151 * user provided area, those ones use a regular affectation. It only works
152 * for scalar values, but should be a little faster.
157 /** @brief Quick retrieval of scalar content
158 * @hideinitializer */
159 # define xbt_dynar_get_as(dynar,idx,type) \
160 (*(type*)xbt_dynar_get_ptr((dynar),(idx)))
161 /** @brief Quick setting of scalar content
162 * @hideinitializer */
163 # define xbt_dynar_set_as(dynar,idx,type,val) \
164 (*(type*)xbt_dynar_get_ptr((dynar),(idx))) = val
165 /** @brief Quick retrieval of scalar content
166 * @hideinitializer */
167 # define xbt_dynar_getlast_as(dynar,type) \
168 (*(type*)xbt_dynar_get_ptr((dynar),xbt_dynar_length(dynar)-1))
169 /** @brief Quick retrieval of scalar content
170 * @hideinitializer */
171 # define xbt_dynar_getfirst_as(dynar,type) \
172 (*(type*)xbt_dynar_get_ptr((dynar),0))
173 /** @brief Quick insertion of scalar content
174 * @hideinitializer */
175 # define xbt_dynar_insert_at_as(dynar,idx,type,value) \
176 *(type*)xbt_dynar_insert_at_ptr(dynar,idx)=value
177 /** @brief Quick insertion of scalar content
178 * @hideinitializer */
179 # define xbt_dynar_push_as(dynar,type,value) \
180 *(type*)xbt_dynar_push_ptr(dynar)=value
181 /** @brief Quick removal of scalar content
182 * @hideinitializer */
183 # define xbt_dynar_pop_as(dynar,type) \
184 (*(type*)xbt_dynar_pop_ptr(dynar))
187 /** @defgroup XBT_dynar_cursor Cursors on dynar
190 * Cursors are used to iterate over the structure. Never add elements to the
191 * DynArr during the traversal. To remove elements, use the
192 * xbt_dynar_cursor_rm() function.
194 * Do not call these functions directly, but only the xbt_dynar_foreach macro.
196 * For synchronized dynars, the dynar will be locked during the whole
197 * loop and it will get unlocked automatically if you traverse all
198 * elements. If you want to break the loop before the end, make sure
199 * to call xbt_dynar_cursor_unlock() before the <tt>break;</tt>
204 XBT_INLINE XBT_PUBLIC(void) xbt_dynar_cursor_rm(xbt_dynar_t dynar,
207 XBT_PUBLIC(void) xbt_dynar_cursor_unlock(xbt_dynar_t dynar);
209 /* do not use this structure internals directly, but use the public interface
210 * This was made public to allow:
211 * - the inlining of the foreach elements
212 * - sending such beasts over the network
215 #include "xbt/synchro_core.h"
216 typedef struct xbt_dynar_s {
219 unsigned long elmsize;
221 void_f_pvoid_t free_f;
225 static XBT_INLINE void
226 _xbt_dynar_cursor_first(const xbt_dynar_t dynar,
227 unsigned int *const cursor)
229 /* don't test for dynar!=NULL. The segfault would tell us */
230 if (dynar->mutex) /* ie _dynar_lock(dynar) but not public */
231 xbt_mutex_acquire(dynar->mutex);
233 //DEBUG1("Set cursor on %p to the first position", (void *) dynar);
237 static XBT_INLINE int
238 _xbt_dynar_cursor_get(const xbt_dynar_t dynar,
239 unsigned int idx, void *const dst)
242 if (idx >= dynar->used) {
243 //DEBUG1("Cursor on %p already on last elem", (void *) dynar);
244 if (dynar->mutex) /* unlock */
245 xbt_mutex_release(dynar->mutex);
248 // DEBUG2("Cash out cursor on %p at %u", (void *) dynar, *idx);
250 memcpy(dst, ((char *) dynar->data) + idx * dynar->elmsize,
258 /** @brief Iterates over the whole dynar.
260 * @param _dynar what to iterate over
261 * @param _cursor an integer used as cursor
265 * \note An example of usage:
270 xbt_dynar_foreach (dyn,cpt,str) {
271 printf("Seen %s\n",str);
275 #define xbt_dynar_foreach(_dynar,_cursor,_data) \
276 for (_xbt_dynar_cursor_first(_dynar,&(_cursor)) ; \
277 _xbt_dynar_cursor_get(_dynar,_cursor,&_data) ; \
283 #endif /* _XBT_DYNAR_H */