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 */
13 #include "xbt/misc.h" /* SG_BEGIN_DECL */
14 #include "xbt/function_types.h"
18 /** @addtogroup XBT_dynar
19 * @brief DynArr are dynamically sized vector which may contain any type of variables.
21 * These are the SimGrid version of the dynamically size arrays, which all C programmer recode one day or another.
23 * For performance concerns, the content of DynArr must be homogeneous (in
24 * contrary to dictionnaries -- see the \ref XBT_dict section). You thus
25 * have to provide the function which will be used to free the content at
26 * structure creation (of type void_f_ppvoid_t or void_f_pvoid_t).
28 * \section XBT_dynar_exscal Example with scalar
29 * \dontinclude dynar.c
36 * \until end_of_traversal
39 * \until xbt_dynar_free
41 * \section XBT_dynar_exptr Example with pointed data
43 * \skip test_dynar_string
51 * \skip end_of_doxygen
55 /** @defgroup XBT_dynar_cons Dynar constructor and destructor
60 /** \brief Dynar data type (opaque type) */
61 typedef struct xbt_dynar_s *xbt_dynar_t;
64 XBT_PUBLIC(xbt_dynar_t) xbt_dynar_new(const unsigned long elm_size,
65 void_f_pvoid_t const free_f);
66 XBT_PUBLIC(xbt_dynar_t) xbt_dynar_new_sync(const unsigned long elm_size,
67 void_f_pvoid_t const free_f);
68 XBT_INLINE XBT_PUBLIC(void) xbt_dynar_free(xbt_dynar_t * dynar);
69 XBT_PUBLIC(void) xbt_dynar_free_voidp(void *dynar);
70 XBT_PUBLIC(void) xbt_dynar_free_container(xbt_dynar_t * dynar);
72 XBT_INLINE XBT_PUBLIC(unsigned long) xbt_dynar_length(const xbt_dynar_t dynar);
73 XBT_PUBLIC(void) xbt_dynar_reset(xbt_dynar_t const dynar);
74 XBT_PUBLIC(void) xbt_dynar_shrink(xbt_dynar_t dynar, int empty_slots);
76 XBT_PUBLIC(void) xbt_dynar_dump(xbt_dynar_t dynar);
79 /** @defgroup XBT_dynar_array Dynar as a regular array
85 XBT_PUBLIC(void) xbt_dynar_get_cpy(const xbt_dynar_t dynar,
86 const unsigned long idx, void *const dst);
88 XBT_PUBLIC(void) xbt_dynar_set(xbt_dynar_t dynar, const int idx,
90 XBT_PUBLIC(void) xbt_dynar_replace(xbt_dynar_t dynar, const unsigned long idx,
93 XBT_PUBLIC(void) xbt_dynar_insert_at(xbt_dynar_t const dynar, const int idx,
95 XBT_PUBLIC(void) xbt_dynar_remove_at(xbt_dynar_t const dynar, const int idx,
98 XBT_PUBLIC(int) xbt_dynar_search(xbt_dynar_t const dynar, void *elem);
99 XBT_PUBLIC(int) xbt_dynar_member(xbt_dynar_t const dynar, void *elem);
100 XBT_PUBLIC(void) xbt_dynar_sort(xbt_dynar_t const dynar, int_f_pvoid_pvoid_t compar_fn);
103 /** @defgroup XBT_dynar_perl Perl-like use of dynars
109 XBT_INLINE XBT_PUBLIC(void) xbt_dynar_push(xbt_dynar_t const dynar, const void *src);
110 XBT_INLINE XBT_PUBLIC(void) xbt_dynar_pop(xbt_dynar_t const dynar, void *const dst);
111 XBT_PUBLIC(void) xbt_dynar_unshift(xbt_dynar_t const dynar, const void *src);
112 XBT_PUBLIC(void) xbt_dynar_shift(xbt_dynar_t const dynar, void *const dst);
113 XBT_PUBLIC(void) xbt_dynar_map(const xbt_dynar_t dynar,
114 void_f_pvoid_t const op);
117 /** @defgroup XBT_dynar_ctn Direct manipulation to the dynars content
120 * Those functions do not retrieve the content, but only their address.
125 XBT_INLINE XBT_PUBLIC(void *) xbt_dynar_get_ptr(const xbt_dynar_t dynar,
126 const unsigned long idx);
127 XBT_PUBLIC(void *) xbt_dynar_insert_at_ptr(xbt_dynar_t const dynar,
129 XBT_PUBLIC(void *) xbt_dynar_push_ptr(xbt_dynar_t const dynar);
130 XBT_PUBLIC(void *) xbt_dynar_pop_ptr(xbt_dynar_t const dynar);
133 /** @defgroup XBT_dynar_speed Speed optimized access to dynars of scalars
136 * While the other functions use a memcpy to retrieve the content into the
137 * user provided area, those ones use a regular affectation. It only works
138 * for scalar values, but should be a little faster.
143 /** @brief Quick retrieval of scalar content
144 * @hideinitializer */
145 # define xbt_dynar_get_as(dynar,idx,type) \
146 (*(type*)xbt_dynar_get_ptr((dynar),(idx)))
147 /** @brief Quick retrieval of scalar content
148 * @hideinitializer */
149 # define xbt_dynar_getlast_as(dynar,type) \
150 (*(type*)xbt_dynar_get_ptr((dynar),xbt_dynar_length(dynar)-1))
151 /** @brief Quick retrieval of scalar content
152 * @hideinitializer */
153 # define xbt_dynar_getfirst_as(dynar,type) \
154 (*(type*)xbt_dynar_get_ptr((dynar),0))
155 /** @brief Quick insertion of scalar content
156 * @hideinitializer */
157 # define xbt_dynar_insert_at_as(dynar,idx,type,value) \
158 *(type*)xbt_dynar_insert_at_ptr(dynar,idx)=value
159 /** @brief Quick insertion of scalar content
160 * @hideinitializer */
161 # define xbt_dynar_push_as(dynar,type,value) \
162 *(type*)xbt_dynar_push_ptr(dynar)=value
163 /** @brief Quick removal of scalar content
164 * @hideinitializer */
165 # define xbt_dynar_pop_as(dynar,type) \
166 (*(type*)xbt_dynar_pop_ptr(dynar))
169 /** @defgroup XBT_dynar_cursor Cursors on dynar
172 * Cursors are used to iterate over the structure. Never add elements to the
173 * DynArr during the traversal. To remove elements, use the
174 * xbt_dynar_cursor_rm() function.
176 * Do not call these functions directly, but only the xbt_dynar_foreach macro.
178 * For synchronized dynars, the dynar will be locked during the whole
179 * loop and it will get unlocked automatically if you traverse all
180 * elements. If you want to break the loop before the end, make sure
181 * to call xbt_dynar_cursor_unlock() before the <tt>break;</tt>
186 XBT_INLINE XBT_PUBLIC(void) xbt_dynar_cursor_rm(xbt_dynar_t dynar,
187 unsigned int *const cursor);
188 XBT_PUBLIC(void) xbt_dynar_cursor_unlock(xbt_dynar_t dynar);
190 /* do not use this structure internals directly, but use the public interface
191 * This was made public to allow:
192 * - the inlining of the foreach elements
193 * - sending such beasts over the network
196 #include "xbt/synchro_core.h"
197 typedef struct xbt_dynar_s {
200 unsigned long elmsize;
202 void_f_pvoid_t free_f;
206 static XBT_INLINE void
207 _xbt_dynar_cursor_first(const xbt_dynar_t dynar, unsigned int *const cursor)
209 /* don't test for dynar!=NULL. The segfault would tell us */
210 if (dynar->mutex) /* ie _dynar_lock(dynar) but not public */
211 xbt_mutex_acquire(dynar->mutex);
213 //DEBUG1("Set cursor on %p to the first position", (void *) dynar);
217 static XBT_INLINE int
218 _xbt_dynar_cursor_get(const xbt_dynar_t dynar,
219 unsigned int idx, void *const dst)
222 if (idx >= dynar->used) {
223 //DEBUG1("Cursor on %p already on last elem", (void *) dynar);
224 if (dynar->mutex) /* unlock */
225 xbt_mutex_release(dynar->mutex);
228 // DEBUG2("Cash out cursor on %p at %u", (void *) dynar, *idx);
230 memcpy(dst, ((char*)dynar->data) + idx * dynar->elmsize, dynar->elmsize);
237 /** @brief Iterates over the whole dynar.
239 * @param _dynar what to iterate over
240 * @param _cursor an integer used as cursor
244 * \note An example of usage:
249 xbt_dynar_foreach (dyn,cpt,str) {
250 printf("Seen %s\n",str);
254 #define xbt_dynar_foreach(_dynar,_cursor,_data) \
255 for (_xbt_dynar_cursor_first(_dynar,&(_cursor)) ; \
256 _xbt_dynar_cursor_get(_dynar,_cursor,&_data) ; \
262 #endif /* _XBT_DYNAR_H */