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 dynar);
74 XBT_PUBLIC(void) xbt_dynar_reset(xbt_dynar_t const dynar);
75 XBT_PUBLIC(void) xbt_dynar_shrink(xbt_dynar_t dynar, int empty_slots);
77 XBT_PUBLIC(void) xbt_dynar_dump(xbt_dynar_t dynar);
80 /** @defgroup XBT_dynar_array Dynar as a regular array
86 XBT_PUBLIC(void) xbt_dynar_get_cpy(const xbt_dynar_t dynar,
87 const unsigned long idx, void *const dst);
89 XBT_PUBLIC(void) xbt_dynar_set(xbt_dynar_t dynar, const int idx,
91 XBT_PUBLIC(void) xbt_dynar_replace(xbt_dynar_t dynar, const unsigned long idx,
94 XBT_PUBLIC(void) xbt_dynar_insert_at(xbt_dynar_t const dynar, const int idx,
96 XBT_PUBLIC(void) xbt_dynar_remove_at(xbt_dynar_t const dynar, const int idx,
99 XBT_PUBLIC(int) xbt_dynar_search(xbt_dynar_t const dynar, void *elem);
100 XBT_PUBLIC(int) xbt_dynar_member(xbt_dynar_t const dynar, void *elem);
101 XBT_PUBLIC(void) xbt_dynar_sort(xbt_dynar_t const dynar, int_f_cpvoid_cpvoid_t compar_fn);
104 /** @defgroup XBT_dynar_perl Perl-like use of dynars
110 XBT_INLINE XBT_PUBLIC(void) xbt_dynar_push(xbt_dynar_t const dynar, const void *src);
111 XBT_INLINE XBT_PUBLIC(void) xbt_dynar_pop(xbt_dynar_t const dynar, void *const dst);
112 XBT_PUBLIC(void) xbt_dynar_unshift(xbt_dynar_t const dynar, const void *src);
113 XBT_PUBLIC(void) xbt_dynar_shift(xbt_dynar_t const dynar, void *const dst);
114 XBT_PUBLIC(void) xbt_dynar_map(const xbt_dynar_t dynar,
115 void_f_pvoid_t const op);
118 /** @defgroup XBT_dynar_ctn Direct manipulation to the dynars content
121 * Those functions do not retrieve the content, but only their address.
126 XBT_INLINE XBT_PUBLIC(void *) xbt_dynar_get_ptr(const xbt_dynar_t dynar,
127 const unsigned long idx);
128 XBT_PUBLIC(void *) xbt_dynar_insert_at_ptr(xbt_dynar_t const dynar,
130 XBT_PUBLIC(void *) xbt_dynar_push_ptr(xbt_dynar_t const dynar);
131 XBT_PUBLIC(void *) xbt_dynar_pop_ptr(xbt_dynar_t const dynar);
134 /** @defgroup XBT_dynar_speed Speed optimized access to dynars of scalars
137 * While the other functions use a memcpy to retrieve the content into the
138 * user provided area, those ones use a regular affectation. It only works
139 * for scalar values, but should be a little faster.
144 /** @brief Quick retrieval of scalar content
145 * @hideinitializer */
146 # define xbt_dynar_get_as(dynar,idx,type) \
147 (*(type*)xbt_dynar_get_ptr((dynar),(idx)))
148 /** @brief Quick retrieval of scalar content
149 * @hideinitializer */
150 # define xbt_dynar_getlast_as(dynar,type) \
151 (*(type*)xbt_dynar_get_ptr((dynar),xbt_dynar_length(dynar)-1))
152 /** @brief Quick retrieval of scalar content
153 * @hideinitializer */
154 # define xbt_dynar_getfirst_as(dynar,type) \
155 (*(type*)xbt_dynar_get_ptr((dynar),0))
156 /** @brief Quick insertion of scalar content
157 * @hideinitializer */
158 # define xbt_dynar_insert_at_as(dynar,idx,type,value) \
159 *(type*)xbt_dynar_insert_at_ptr(dynar,idx)=value
160 /** @brief Quick insertion of scalar content
161 * @hideinitializer */
162 # define xbt_dynar_push_as(dynar,type,value) \
163 *(type*)xbt_dynar_push_ptr(dynar)=value
164 /** @brief Quick removal of scalar content
165 * @hideinitializer */
166 # define xbt_dynar_pop_as(dynar,type) \
167 (*(type*)xbt_dynar_pop_ptr(dynar))
170 /** @defgroup XBT_dynar_cursor Cursors on dynar
173 * Cursors are used to iterate over the structure. Never add elements to the
174 * DynArr during the traversal. To remove elements, use the
175 * xbt_dynar_cursor_rm() function.
177 * Do not call these functions directly, but only the xbt_dynar_foreach macro.
179 * For synchronized dynars, the dynar will be locked during the whole
180 * loop and it will get unlocked automatically if you traverse all
181 * elements. If you want to break the loop before the end, make sure
182 * to call xbt_dynar_cursor_unlock() before the <tt>break;</tt>
187 XBT_INLINE XBT_PUBLIC(void) xbt_dynar_cursor_rm(xbt_dynar_t dynar,
188 unsigned int *const cursor);
189 XBT_PUBLIC(void) xbt_dynar_cursor_unlock(xbt_dynar_t dynar);
191 /* do not use this structure internals directly, but use the public interface
192 * This was made public to allow:
193 * - the inlining of the foreach elements
194 * - sending such beasts over the network
197 #include "xbt/synchro_core.h"
198 typedef struct xbt_dynar_s {
201 unsigned long elmsize;
203 void_f_pvoid_t free_f;
207 static XBT_INLINE void
208 _xbt_dynar_cursor_first(const xbt_dynar_t dynar, unsigned int *const cursor)
210 /* don't test for dynar!=NULL. The segfault would tell us */
211 if (dynar->mutex) /* ie _dynar_lock(dynar) but not public */
212 xbt_mutex_acquire(dynar->mutex);
214 //DEBUG1("Set cursor on %p to the first position", (void *) dynar);
218 static XBT_INLINE int
219 _xbt_dynar_cursor_get(const xbt_dynar_t dynar,
220 unsigned int idx, void *const dst)
223 if (idx >= dynar->used) {
224 //DEBUG1("Cursor on %p already on last elem", (void *) dynar);
225 if (dynar->mutex) /* unlock */
226 xbt_mutex_release(dynar->mutex);
229 // DEBUG2("Cash out cursor on %p at %u", (void *) dynar, *idx);
231 memcpy(dst, ((char*)dynar->data) + idx * dynar->elmsize, dynar->elmsize);
238 /** @brief Iterates over the whole dynar.
240 * @param _dynar what to iterate over
241 * @param _cursor an integer used as cursor
245 * \note An example of usage:
250 xbt_dynar_foreach (dyn,cpt,str) {
251 printf("Seen %s\n",str);
255 #define xbt_dynar_foreach(_dynar,_cursor,_data) \
256 for (_xbt_dynar_cursor_first(_dynar,&(_cursor)) ; \
257 _xbt_dynar_cursor_get(_dynar,_cursor,&_data) ; \
263 #endif /* _XBT_DYNAR_H */