X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/509304ee1435b62cd49eb9071995fab468f68f58..16046da568d3d690d7dfdedc12c4416f71984acb:/include/xbt/dynar.h diff --git a/include/xbt/dynar.h b/include/xbt/dynar.h index d793aacb1c..b8ae658b86 100644 --- a/include/xbt/dynar.h +++ b/include/xbt/dynar.h @@ -1,98 +1,264 @@ -/* $Id$ */ +/* dynar - a generic dynamic array */ -/* dynar - a generic dynamic array */ - -/* Authors: Martin Quinson */ -/* Copyright (C) 2003 the OURAGAN project. */ +/* Copyright (c) 2004, 2005, 2006, 2007, 2009, 2010. The SimGrid Team. + * All rights reserved. */ /* This program is free software; you can redistribute it and/or modify it - under the terms of the license (GNU LGPL) which comes with this package. */ + * under the terms of the license (GNU LGPL) which comes with this package. */ #ifndef _XBT_DYNAR_H #define _XBT_DYNAR_H -#include "xbt/misc.h" /* BEGIN_DECL */ +#include /* memcpy */ + +#include "xbt/misc.h" /* SG_BEGIN_DECL */ +#include "xbt/function_types.h" + +SG_BEGIN_DECL() -BEGIN_DECL +/** @addtogroup XBT_dynar + * @brief DynArr are dynamically sized vector which may contain any type of variables. + * + * These are the SimGrid version of the dynamically size arrays, which all C programmer recode one day or another. + * + * For performance concerns, the content of DynArr must be homogeneous (in + * contrary to dictionnaries -- see the \ref XBT_dict section). You thus + * have to provide the function which will be used to free the content at + * structure creation (of type void_f_ppvoid_t or void_f_pvoid_t). + * + * \section XBT_dynar_exscal Example with scalar + * \dontinclude dynar.c + * + * \skip Vars_decl + * \skip dyn + * \until iptr + * \skip Populate_ints + * \skip dyn + * \until end_of_traversal + * \skip shifting + * \skip val + * \until xbt_dynar_free + * + * \section XBT_dynar_exptr Example with pointed data + * + * \skip test_dynar_string + * \skip dynar_t + * \until s2 + * \skip Populate_str + * \skip dyn + * \until } + * \skip macro + * \until dynar_free + * \skip end_of_doxygen + * \until } + * + */ +/** @defgroup XBT_dynar_cons Dynar constructor and destructor + * @ingroup XBT_dynar + * + * @{ + */ + /** \brief Dynar data type (opaque type) */ + typedef struct xbt_dynar_s *xbt_dynar_t; -typedef struct xbt_dynar_s *xbt_dynar_t; -xbt_dynar_t xbt_dynar_new(unsigned long elm_size, - void_f_pvoid_t *free_func); -void xbt_dynar_free(xbt_dynar_t *dynar); -void xbt_dynar_free_container(xbt_dynar_t *dynar); +XBT_PUBLIC(xbt_dynar_t) xbt_dynar_new(const unsigned long elm_size, + void_f_pvoid_t const free_f); +XBT_PUBLIC(xbt_dynar_t) xbt_dynar_new_sync(const unsigned long elm_size, + void_f_pvoid_t const free_f); +XBT_INLINE XBT_PUBLIC(void) xbt_dynar_free(xbt_dynar_t * dynar); +XBT_PUBLIC(void) xbt_dynar_free_voidp(void *dynar); +XBT_PUBLIC(void) xbt_dynar_free_container(xbt_dynar_t * dynar); + +XBT_INLINE XBT_PUBLIC(unsigned long) xbt_dynar_length(const xbt_dynar_t dynar); +XBT_INLINE XBT_PUBLIC (int) xbt_dynar_is_empty(const xbt_dynar_t dynar); +XBT_PUBLIC(void) xbt_dynar_reset(xbt_dynar_t const dynar); +XBT_PUBLIC(void) xbt_dynar_shrink(xbt_dynar_t dynar, int empty_slots); + +XBT_PUBLIC(void) xbt_dynar_dump(xbt_dynar_t dynar); + +/** @} */ +/** @defgroup XBT_dynar_array Dynar as a regular array + * @ingroup XBT_dynar + * + * @{ + */ -unsigned long xbt_dynar_length(const xbt_dynar_t dynar); -void xbt_dynar_reset(xbt_dynar_t dynar); +XBT_PUBLIC(void) xbt_dynar_get_cpy(const xbt_dynar_t dynar, + const unsigned long idx, void *const dst); +XBT_PUBLIC(void) xbt_dynar_set(xbt_dynar_t dynar, const int idx, + const void *src); +XBT_PUBLIC(void) xbt_dynar_replace(xbt_dynar_t dynar, const unsigned long idx, + const void *object); -/* regular array functions */ -void xbt_dynar_get_cpy(const xbt_dynar_t dynar, int idx, void *const dst); -void *xbt_dynar_get_ptr(const xbt_dynar_t dynar, - const int idx); +XBT_PUBLIC(void) xbt_dynar_insert_at(xbt_dynar_t const dynar, const int idx, + const void *src); +XBT_PUBLIC(void) xbt_dynar_remove_at(xbt_dynar_t const dynar, const int idx, + void *const dst); -#define xbt_dynar_get_as(dynar,idx,type) *(type*)xbt_dynar_get_ptr(dynar,idx) - -void xbt_dynar_set(xbt_dynar_t dynar, int idx, const void *src); -void xbt_dynar_replace(xbt_dynar_t dynar, - int idx, const void *object); +XBT_PUBLIC(unsigned int) xbt_dynar_search(xbt_dynar_t const dynar, void *elem); +XBT_PUBLIC(int) xbt_dynar_member(xbt_dynar_t const dynar, void *elem); +XBT_PUBLIC(void) xbt_dynar_sort(xbt_dynar_t const dynar, int_f_cpvoid_cpvoid_t compar_fn); -/* perl array function */ +/** @} */ +/** @defgroup XBT_dynar_perl Perl-like use of dynars + * @ingroup XBT_dynar + * + * @{ + */ -void xbt_dynar_insert_at(xbt_dynar_t dynar, - int idx, const void *src); -void xbt_dynar_remove_at(xbt_dynar_t dynar, - int idx, void *object); -void xbt_dynar_push (xbt_dynar_t dynar, const void *src); -void xbt_dynar_pop (xbt_dynar_t dynar, void *const dst); -void xbt_dynar_unshift (xbt_dynar_t dynar, const void *src); -void xbt_dynar_shift (xbt_dynar_t dynar, void *const dst); -void xbt_dynar_map (const xbt_dynar_t dynar, void_f_pvoid_t *operator); +XBT_INLINE XBT_PUBLIC(void) xbt_dynar_push(xbt_dynar_t const dynar, const void *src); +XBT_INLINE XBT_PUBLIC(void) xbt_dynar_pop(xbt_dynar_t const dynar, void *const dst); +XBT_PUBLIC(void) xbt_dynar_unshift(xbt_dynar_t const dynar, const void *src); +XBT_PUBLIC(void) xbt_dynar_shift(xbt_dynar_t const dynar, void *const dst); +XBT_PUBLIC(void) xbt_dynar_map(const xbt_dynar_t dynar, + void_f_pvoid_t const op); -/* speed-optimized versions */ -void *xbt_dynar_insert_at_ptr(xbt_dynar_t const dynar, - const int idx); -void *xbt_dynar_push_ptr(xbt_dynar_t dynar); -void *xbt_dynar_pop_ptr(xbt_dynar_t dynar); +/** @} */ +/** @defgroup XBT_dynar_ctn Direct manipulation to the dynars content + * @ingroup XBT_dynar + * + * Those functions do not retrieve the content, but only their address. + * + * @{ + */ -#define xbt_dynar_insert_at_as(dynar,idx,type,value) *(type*)xbt_dynar_insert_at_ptr(dynar,idx)=value -#define xbt_dynar_push_as(dynar,type,value) *(type*)xbt_dynar_push_ptr(dynar)=value -#define xbt_dynar_pop_as(dynar,type) *(type*)xbt_dynar_pop_ptr(dynar) +XBT_INLINE XBT_PUBLIC(void *) xbt_dynar_get_ptr(const xbt_dynar_t dynar, + const unsigned long idx); +XBT_PUBLIC(void *) xbt_dynar_insert_at_ptr(xbt_dynar_t const dynar, + const int idx); +XBT_PUBLIC(void *) xbt_dynar_push_ptr(xbt_dynar_t const dynar); +XBT_PUBLIC(void *) xbt_dynar_pop_ptr(xbt_dynar_t const dynar); +/** @} */ +/** @defgroup XBT_dynar_speed Speed optimized access to dynars of scalars + * @ingroup XBT_dynar + * + * While the other functions use a memcpy to retrieve the content into the + * user provided area, those ones use a regular affectation. It only works + * for scalar values, but should be a little faster. + * + * @{ + */ -/* cursor functions */ -void xbt_dynar_cursor_first (const xbt_dynar_t dynar, int *cursor); -void xbt_dynar_cursor_step (const xbt_dynar_t dynar, int *cursor); -int xbt_dynar_cursor_get (const xbt_dynar_t dynar, int *cursor, void *whereto); + /** @brief Quick retrieval of scalar content + * @hideinitializer */ +# define xbt_dynar_get_as(dynar,idx,type) \ + (*(type*)xbt_dynar_get_ptr((dynar),(idx))) + /** @brief Quick retrieval of scalar content + * @hideinitializer */ +# define xbt_dynar_getlast_as(dynar,type) \ + (*(type*)xbt_dynar_get_ptr((dynar),xbt_dynar_length(dynar)-1)) + /** @brief Quick retrieval of scalar content + * @hideinitializer */ +# define xbt_dynar_getfirst_as(dynar,type) \ + (*(type*)xbt_dynar_get_ptr((dynar),0)) + /** @brief Quick insertion of scalar content + * @hideinitializer */ +# define xbt_dynar_insert_at_as(dynar,idx,type,value) \ + *(type*)xbt_dynar_insert_at_ptr(dynar,idx)=value + /** @brief Quick insertion of scalar content + * @hideinitializer */ +# define xbt_dynar_push_as(dynar,type,value) \ + *(type*)xbt_dynar_push_ptr(dynar)=value + /** @brief Quick removal of scalar content + * @hideinitializer */ +# define xbt_dynar_pop_as(dynar,type) \ + (*(type*)xbt_dynar_pop_ptr(dynar)) -/** - * xbt_dynar_foreach: - * @_dynar: what to iterate over - * @_cursor: an integer used as cursor - * @_data: +/** @} */ +/** @defgroup XBT_dynar_cursor Cursors on dynar + * @ingroup XBT_dynar * - * Iterates over the whole dynar. Example: + * Cursors are used to iterate over the structure. Never add elements to the + * DynArr during the traversal. To remove elements, use the + * xbt_dynar_cursor_rm() function. * - * - * xbt_dynar_t *dyn; - * int cpt; - * string *str; - * xbt_dynar_foreach (dyn,cpt,str) { - * printf("Seen %s\n",str); - * } + * Do not call these functions directly, but only the xbt_dynar_foreach macro. + * + * For synchronized dynars, the dynar will be locked during the whole + * loop and it will get unlocked automatically if you traverse all + * elements. If you want to break the loop before the end, make sure + * to call xbt_dynar_cursor_unlock() before the break; + * + * @{ + */ + +XBT_INLINE XBT_PUBLIC(void) xbt_dynar_cursor_rm(xbt_dynar_t dynar, + unsigned int *const cursor); +XBT_PUBLIC(void) xbt_dynar_cursor_unlock(xbt_dynar_t dynar); + +/* do not use this structure internals directly, but use the public interface + * This was made public to allow: + * - the inlining of the foreach elements + * - sending such beasts over the network + */ + +#include "xbt/synchro_core.h" +typedef struct xbt_dynar_s { + unsigned long size; + unsigned long used; + unsigned long elmsize; + void *data; + void_f_pvoid_t free_f; + xbt_mutex_t mutex; +} s_xbt_dynar_t; + +static XBT_INLINE void +_xbt_dynar_cursor_first(const xbt_dynar_t dynar, unsigned int *const cursor) +{ + /* don't test for dynar!=NULL. The segfault would tell us */ + if (dynar->mutex) /* ie _dynar_lock(dynar) but not public */ + xbt_mutex_acquire(dynar->mutex); + + //DEBUG1("Set cursor on %p to the first position", (void *) dynar); + *cursor = 0; +} + +static XBT_INLINE int +_xbt_dynar_cursor_get(const xbt_dynar_t dynar, + unsigned int idx, void *const dst) +{ + + if (idx >= dynar->used) { + //DEBUG1("Cursor on %p already on last elem", (void *) dynar); + if (dynar->mutex) /* unlock */ + xbt_mutex_release(dynar->mutex); + return FALSE; + } + // DEBUG2("Cash out cursor on %p at %u", (void *) dynar, *idx); + + memcpy(dst, ((char*)dynar->data) + idx * dynar->elmsize, dynar->elmsize); + + return TRUE; +} + + + +/** @brief Iterates over the whole dynar. + * + * @param _dynar what to iterate over + * @param _cursor an integer used as cursor + * @param _data + * @hideinitializer + * + * \note An example of usage: + * \code +xbt_dynar_t dyn; +unsigned int cpt; +string *str; +xbt_dynar_foreach (dyn,cpt,str) { + printf("Seen %s\n",str); +} +\endcode */ #define xbt_dynar_foreach(_dynar,_cursor,_data) \ - for (xbt_dynar_cursor_first(_dynar,&(_cursor)) ; \ - xbt_dynar_cursor_get(_dynar,&(_cursor),&_data) ; \ - xbt_dynar_cursor_step(_dynar,&(_cursor)) ) -/* - for (xbt_dynar_length(_dynar) && (_xbt_dynar_cursor_first(_dynar,&_cursor), \ - 1); \ - xbt_dynar_length(_dynar) && xbt_dynar_cursor_get(_dynar,&_cursor,&_data); \ - xbt_dynar_cursor_step(_dynar,&_cursor)) -*/ -void xbt_dynar_cursor_rm(xbt_dynar_t dynar, - int *const cursor); - -END_DECL + for (_xbt_dynar_cursor_first(_dynar,&(_cursor)) ; \ + _xbt_dynar_cursor_get(_dynar,_cursor,&_data) ; \ + (_cursor)++ ) + +/** @} */ + +SG_END_DECL() #endif /* _XBT_DYNAR_H */