#include "asterisk/inline_api.h"
Go to the source code of this file.
Data Structures | |
struct | ast_string_field_mgr |
struct | ast_string_field_pool |
Defines | |
#define | ast_calloc_with_stringfields(n, type, size) |
Allocate a structure with embedded stringfields in a single allocation. | |
#define | AST_DECLARE_STRING_FIELDS(field_list) |
Declare the fields needed in a structure. | |
#define | AST_STRING_FIELD(name) const ast_string_field name |
Declare a string field. | |
#define | AST_STRING_FIELD_ALLOCATION(x) *((ast_string_field_allocation *) (x - __alignof__(ast_string_field_allocation))) |
Macro to provide access to the allocation field that lives immediately in front of a string field. | |
#define | ast_string_field_build(x, field, fmt, args...) __ast_string_field_ptr_build(&(x)->__field_mgr, &(x)->__field_mgr_pool, (ast_string_field *) &(x)->field, fmt, args) |
Set a field to a complex (built) value. | |
#define | ast_string_field_build_va(x, field, fmt, args1, args2) __ast_string_field_ptr_build_va(&(x)->__field_mgr, &(x)->__field_mgr_pool, (ast_string_field *) &(x)->field, fmt, args1, args2) |
Set a field to a complex (built) value. | |
#define | ast_string_field_free_memory(x) __ast_string_field_init(&(x)->__field_mgr, &(x)->__field_mgr_pool, -1, __FILE__, __LINE__, __PRETTY_FUNCTION__) |
free all memory - to be called before destroying the object | |
#define | ast_string_field_init(x, size) __ast_string_field_init(&(x)->__field_mgr, &(x)->__field_mgr_pool, size, __FILE__, __LINE__, __PRETTY_FUNCTION__) |
Initialize a field pool and fields. | |
#define | ast_string_field_ptr_build(x, ptr, fmt, args...) __ast_string_field_ptr_build(&(x)->__field_mgr, &(x)->__field_mgr_pool, (ast_string_field *) ptr, fmt, args) |
Set a field to a complex (built) value. | |
#define | ast_string_field_ptr_build_va(x, ptr, fmt, args1, args2) __ast_string_field_ptr_build_va(&(x)->__field_mgr, &(x)->__field_mgr_pool, (ast_string_field *) ptr, fmt, args1, args2) |
Set a field to a complex (built) value with prebuilt va_lists. | |
#define | ast_string_field_ptr_set(x, ptr, data) |
Set a field to a simple string value. | |
#define | ast_string_field_set(x, field, data) |
Set a field to a simple string value. | |
Typedefs | |
typedef const char * | ast_string_field |
typedef uint16_t | ast_string_field_allocation |
Functions | |
void *attribute_malloc | __ast_calloc_with_stringfields (unsigned int num_structs, size_t struct_size, size_t field_mgr_offset, size_t field_mgr_pool_offset, size_t pool_size, const char *file, int lineno, const char *func) |
ast_string_field | __ast_string_field_alloc_space (struct ast_string_field_mgr *mgr, struct ast_string_field_pool **pool_head, size_t needed) |
int | __ast_string_field_init (struct ast_string_field_mgr *mgr, struct ast_string_field_pool **pool_head, int needed, const char *file, int lineno, const char *func) |
void | __ast_string_field_ptr_build (struct ast_string_field_mgr *mgr, struct ast_string_field_pool **pool_head, ast_string_field *ptr, const char *format,...) |
void | __ast_string_field_ptr_build_va (struct ast_string_field_mgr *mgr, struct ast_string_field_pool **pool_head, ast_string_field *ptr, const char *format, va_list a1, va_list a2) |
int | __ast_string_field_ptr_grow (struct ast_string_field_mgr *mgr, struct ast_string_field_pool **pool_head, size_t needed, const ast_string_field *ptr) |
void | __ast_string_field_release_active (struct ast_string_field_pool *pool_head, const ast_string_field ptr) |
Variables | |
const char * | __ast_string_field_empty |
This file contains objects and macros used to manage string fields in structures without requiring them to be allocated as fixed-size buffers or requiring individual allocations for for each field.
Using this functionality is quite simple. An example structure with three fields is defined like this:
struct sample_fields { int x1; AST_DECLARE_STRING_FIELDS( AST_STRING_FIELD(foo); AST_STRING_FIELD(bar); AST_STRING_FIELD(blah); ); long x2; };
When an instance of this structure is allocated (either statically or dynamically), the fields and the pool of storage for them must be initialized:
struct sample_fields *x; x = ast_calloc(1, sizeof(*x)); if (x == NULL || ast_string_field_init(x, 252)) { if (x) ast_free(x); x = NULL; ... handle error }
Fields will default to pointing to an empty string, and will revert to that when ast_string_field_set() is called with a NULL argument. A string field will never contain NULL.
ast_string_field_init(x, 0) will reset fields to the initial value while keeping the pool allocated.
Reading the fields is much like using 'const char * const' fields in the structure: you cannot write to the field or to the memory it points to.
Writing to the fields must be done using the wrapper macros listed below; and assignments are always by value (i.e. strings are copied): ast_string_field_set() stores a simple value; ast_string_field_build() builds the string using a printf-style format; ast_string_field_build_va() is the varargs version of the above (for portability reasons it uses two vararg arguments); variants of these function allow passing a pointer to the field as an argument.
ast_string_field_set(x, foo, "infinite loop"); ast_string_field_set(x, foo, NULL); // set to an empty string ast_string_field_ptr_set(x, &x->bar, "right way"); ast_string_field_build(x, blah, "%d %s", zipcode, city); ast_string_field_ptr_build(x, &x->blah, "%d %s", zipcode, city); ast_string_field_build_va(x, bar, fmt, args1, args2) ast_string_field_ptr_build_va(x, &x->bar, fmt, args1, args2)
When the structure instance is no longer needed, the fields and their storage pool must be freed:
ast_string_field_free_memory(x); ast_free(x);
This completes the API description.
Definition in file stringfields.h.
#define ast_calloc_with_stringfields | ( | n, | |||
type, | |||||
size | ) |
Value:
__ast_calloc_with_stringfields(n, sizeof(type), offsetof(type, __field_mgr), offsetof(type, __field_mgr_pool), \ size, __FILE__, __LINE__, __PRETTY_FUNCTION__)
n | Number of structures to allocate (see ast_calloc) | |
type | The type of structure to allocate | |
size | The number of bytes of space (minimum) to allocate for stringfields to use |
Definition at line 275 of file stringfields.h.
Referenced by append_mailbox_mapping(), ast_log(), AST_TEST_DEFINE(), build_extension(), jack_data_alloc(), load_config(), load_module(), raise_exception(), register_group(), register_group_feature(), sip_register(), sip_subscribe_mwi(), sla_build_station(), and sla_build_trunk().
#define AST_DECLARE_STRING_FIELDS | ( | field_list | ) |
Value:
struct ast_string_field_pool *__field_mgr_pool; \ field_list \ struct ast_string_field_mgr __field_mgr
field_list | The list of fields to declare, using AST_STRING_FIELD() for each one. Internally, string fields are stored as a pointer to the head of the pool, followed by individual string fields, and then a struct ast_string_field_mgr which describes the space allocated. We split the two variables so they can be used as markers around the field_list, and this allows us to determine how many entries are in the field, and play with them. In particular, for writing to the fields, we rely on __field_mgr_pool to be a non-const pointer, so we know it has the same size as ast_string_field, and we can use it to locate the fields. |
Definition at line 235 of file stringfields.h.
#define AST_STRING_FIELD | ( | name | ) | const ast_string_field name |
Declare a string field.
name | The field name |
Definition at line 220 of file stringfields.h.
#define AST_STRING_FIELD_ALLOCATION | ( | x | ) | *((ast_string_field_allocation *) (x - __alignof__(ast_string_field_allocation))) |
Macro to provide access to the allocation field that lives immediately in front of a string field.
x | Pointer to the string field |
Definition at line 309 of file stringfields.h.
Referenced by __ast_string_field_alloc_space(), __ast_string_field_ptr_build_va(), __ast_string_field_ptr_grow(), and __ast_string_field_release_active().
#define ast_string_field_build | ( | x, | |||
field, | |||||
fmt, | |||||
args... | ) | __ast_string_field_ptr_build(&(x)->__field_mgr, &(x)->__field_mgr_pool, (ast_string_field *) &(x)->field, fmt, args) |
Set a field to a complex (built) value.
x | Pointer to a structure containing fields | |
field | Name of the field to set | |
fmt | printf-style format string | |
args | Arguments for format string |
Definition at line 365 of file stringfields.h.
Referenced by __ast_channel_alloc_ap(), action_originate(), build_callid_pvt(), build_callid_registry(), build_contact(), build_user(), caldav_write_event(), handle_request_subscribe(), init_acf_query(), load_config(), make_our_tag(), parse_cdata(), parse_moved_contact(), parse_register_contact(), set_nonce_randdata(), sip_sendhtml(), sip_sipredirect(), and t30_phase_e_handler().
#define ast_string_field_build_va | ( | x, | |||
field, | |||||
fmt, | |||||
args1, | |||||
args2 | ) | __ast_string_field_ptr_build_va(&(x)->__field_mgr, &(x)->__field_mgr_pool, (ast_string_field *) &(x)->field, fmt, args1, args2) |
Set a field to a complex (built) value.
x | Pointer to a structure containing fields | |
field | Name of the field to set | |
fmt | printf-style format string | |
args1 | argument one | |
args2 | argument two |
Definition at line 389 of file stringfields.h.
Referenced by __ast_channel_alloc_ap().
#define ast_string_field_free_memory | ( | x | ) | __ast_string_field_init(&(x)->__field_mgr, &(x)->__field_mgr_pool, -1, __FILE__, __LINE__, __PRETTY_FUNCTION__) |
free all memory - to be called before destroying the object
Definition at line 253 of file stringfields.h.
Referenced by __sip_destroy(), action_destroy(), ast_channel_destructor(), ast_custom_function_unregister(), ast_dummy_channel_destructor(), ast_pbx_outgoing_app(), ast_pbx_run_app(), AST_TEST_DEFINE(), ast_unregister_application(), ast_unregister_groups(), build_user(), caldav_destructor(), calendar_destructor(), calendar_event_destructor(), delete_extension(), delete_file(), destroy_fast_originate_helper(), destroy_jack_data(), destroy_mailbox_mapping(), destroy_queue(), destroy_session_details(), destroy_station(), destroy_trunk(), ewscal_destructor(), exception_store_free(), exchangecal_destructor(), free_acf_query(), free_outgoing(), icalendar_destructor(), init_acf_query(), load_module(), peer_destructor(), profile_destructor(), pvt_destructor(), realtime_multi_odbc(), realtime_odbc(), route_destructor(), sip_destroy_peer(), sip_monitor_instance_destructor(), sip_registry_destroy(), sip_subscribe_mwi_destroy(), tds_unload_module(), temp_pvt_cleanup(), update_odbc(), and user_destructor().
#define ast_string_field_init | ( | x, | |||
size | ) | __ast_string_field_init(&(x)->__field_mgr, &(x)->__field_mgr_pool, size, __FILE__, __LINE__, __PRETTY_FUNCTION__) |
Initialize a field pool and fields.
x | Pointer to a structure containing fields | |
size | Amount of storage to allocate. Use 0 to reset fields to the default value, and release all but the most recent pool. size<0 (used internally) means free all pools. |
Definition at line 249 of file stringfields.h.
Referenced by __ast_channel_alloc_ap(), acf_retrieve_docs(), action_originate(), alloc_queue(), ast_calendar_event_alloc(), ast_dummy_channel_alloc(), ast_manager_register2(), ast_pbx_outgoing_app(), ast_register_application2(), build_calendar(), build_peer(), build_profile(), build_route(), build_user(), caldav_load_calendar(), ewscal_load_calendar(), exchangecal_load_calendar(), ical_load_calendar(), init_acf_query(), init_outgoing(), init_pvt(), new_iax(), realtime_multi_odbc(), realtime_odbc(), session_details_new(), sip_alloc(), sip_monitor_instance_init(), tds_load_module(), temp_peer(), temp_pvt_init(), transmit_response_using_temp(), and update_odbc().
#define ast_string_field_ptr_build | ( | x, | |||
ptr, | |||||
fmt, | |||||
args... | ) | __ast_string_field_ptr_build(&(x)->__field_mgr, &(x)->__field_mgr_pool, (ast_string_field *) ptr, fmt, args) |
Set a field to a complex (built) value.
x | Pointer to a structure containing fields | |
ptr | Pointer to a field within the structure | |
fmt | printf-style format string | |
args | Arguments for format string |
Definition at line 354 of file stringfields.h.
#define ast_string_field_ptr_build_va | ( | x, | |||
ptr, | |||||
fmt, | |||||
args1, | |||||
args2 | ) | __ast_string_field_ptr_build_va(&(x)->__field_mgr, &(x)->__field_mgr_pool, (ast_string_field *) ptr, fmt, args1, args2) |
Set a field to a complex (built) value with prebuilt va_lists.
x | Pointer to a structure containing fields | |
ptr | Pointer to a field within the structure | |
fmt | printf-style format string | |
args1 | Arguments for format string in va_list format | |
args2 | a second copy of the va_list for the sake of bsd, with no va_list copy operation |
Definition at line 377 of file stringfields.h.
#define ast_string_field_ptr_set | ( | x, | |||
ptr, | |||||
data | ) |
Set a field to a simple string value.
x | Pointer to a structure containing fields | |
ptr | Pointer to a field within the structure | |
data | String value to be copied into the field |
Definition at line 318 of file stringfields.h.
Referenced by ast_parse_digest(), and reply_digest().
#define ast_string_field_set | ( | x, | |||
field, | |||||
data | ) |
Value:
do { \ ast_string_field_ptr_set(x, &(x)->field, data); \ } while (0)
x | Pointer to a structure containing fields | |
field | Name of the field to set | |
data | String value to be copied into the field |
Definition at line 342 of file stringfields.h.
Referenced by __ast_change_name_nolink(), __ast_channel_alloc_ap(), __find_callno(), __oh323_new(), __sip_subscribe_mwi_do(), acf_faxopt_write(), acf_retrieve_docs(), action_originate(), agent_new(), alloc_queue(), alsa_new(), analog_new_ast_channel(), append_mailbox_mapping(), apply_outgoing(), ast_call_forward(), ast_cdr_setaccount(), ast_cdr_setpeeraccount(), ast_cel_fabricate_channel_from_event(), ast_channel_change_linkedid(), ast_do_masquerade(), ast_iax2_new(), ast_log(), ast_manager_register2(), ast_parse_digest(), ast_pbx_outgoing_app(), ast_register_application2(), ast_set_hangupsource(), ast_set_owners_and_peers(), authenticate_reply(), authenticate_request(), authenticate_verify(), begin_dial_channel(), build_calendar(), build_extension(), build_peer(), build_profile(), build_route(), build_user(), cache_get_callno_locked(), caldav_add_event(), caldav_load_calendar(), calendar_write_exec(), change_callid_pvt(), check_access(), check_peer_ok(), check_user_full(), conf_start_moh(), console_new(), copy_event_data(), create_addr(), create_addr_from_peer(), custom_prepare(), dahdi_new(), dial_exec_full(), do_forward(), endelm(), ewscal_load_calendar(), exchangecal_load_calendar(), extract_uri(), feature_request_and_dial(), findmeexec(), generic_fax_exec(), get_also_info(), get_destination(), get_pai(), get_realm(), get_rpid(), gtalk_new(), handle_cc_notify(), handle_incoming(), handle_options(), handle_request_bye(), handle_request_invite(), handle_request_options(), handle_request_publish(), handle_request_refer(), handle_response(), handle_response_invite(), handle_response_notify(), handle_response_publish(), handle_response_subscribe(), iax2_call(), iax2_request(), iax_park(), ical_load_calendar(), icalendar_add_event(), init_acf_query(), init_pvt(), init_queue(), initreqprep(), jingle_new(), load_config(), local_call(), logger_print_normal(), mgcp_new(), misdn_facility_ie_handler(), moh_handle_digit(), monitor_dial(), nbs_new(), new_iax(), oss_new(), parse_moved_contact(), parse_ok_contact(), parse_register_contact(), phone_new(), queue_set_param(), raise_exception(), read_config(), receivefax_exec(), reg_source_db(), register_group(), register_group_feature(), register_verify(), registry_authrequest(), reply_digest(), reqprep(), respprep(), ring_entry(), save_osptoken(), sendfax_exec(), set_moh_exec(), set_peer_defaults(), set_pvt_defaults(), sig_pri_handle_subcmds(), sip_alloc(), sip_call(), sip_monitor_instance_init(), sip_new(), sip_park(), sip_parse_register_line(), sip_poke_peer(), sip_request_call(), sip_send_mwi_to_peer(), sip_set_redirstr(), sip_subscribe_mwi(), skinny_new(), sla_build_station(), sla_build_trunk(), socket_process(), startelm(), store_callerid(), t30_phase_e_handler(), tds_load_module(), transmit_refer(), transmit_register(), transmit_response_using_temp(), unistim_new(), vm_execmain(), and wait_for_answer().
typedef const char* ast_string_field |
Definition at line 115 of file stringfields.h.
typedef uint16_t ast_string_field_allocation |
Definition at line 119 of file stringfields.h.
void* attribute_malloc __ast_calloc_with_stringfields | ( | unsigned int | num_structs, | |
size_t | struct_size, | |||
size_t | field_mgr_offset, | |||
size_t | field_mgr_pool_offset, | |||
size_t | pool_size, | |||
const char * | file, | |||
int | lineno, | |||
const char * | func | |||
) |
Definition at line 1807 of file utils.c.
References __ast_calloc(), __ast_string_field_empty, allocation, ast_calloc, ast_string_field_pool::base, ast_string_field_mgr::embedded_pool, optimal_alloc_size(), and ast_string_field_pool::size.
01810 { 01811 struct ast_string_field_mgr *mgr; 01812 struct ast_string_field_pool *pool; 01813 struct ast_string_field_pool **pool_head; 01814 size_t pool_size_needed = sizeof(*pool) + pool_size; 01815 size_t size_to_alloc = optimal_alloc_size(struct_size + pool_size_needed); 01816 void *allocation; 01817 unsigned int x; 01818 01819 #if defined(__AST_DEBUG_MALLOC) 01820 if (!(allocation = __ast_calloc(num_structs, size_to_alloc, file, lineno, func))) { 01821 return NULL; 01822 } 01823 #else 01824 if (!(allocation = ast_calloc(num_structs, size_to_alloc))) { 01825 return NULL; 01826 } 01827 #endif 01828 01829 for (x = 0; x < num_structs; x++) { 01830 void *base = allocation + (size_to_alloc * x); 01831 const char **p; 01832 01833 mgr = base + field_mgr_offset; 01834 pool_head = base + field_mgr_pool_offset; 01835 pool = base + struct_size; 01836 01837 p = (const char **) pool_head + 1; 01838 while ((struct ast_string_field_mgr *) p != mgr) { 01839 *p++ = __ast_string_field_empty; 01840 } 01841 01842 mgr->embedded_pool = pool; 01843 *pool_head = pool; 01844 pool->size = size_to_alloc - struct_size - sizeof(*pool); 01845 #if defined(__AST_DEBUG_MALLOC) 01846 mgr->owner_file = file; 01847 mgr->owner_func = func; 01848 mgr->owner_line = lineno; 01849 #endif 01850 } 01851 01852 return allocation; 01853 }
ast_string_field __ast_string_field_alloc_space | ( | struct ast_string_field_mgr * | mgr, | |
struct ast_string_field_pool ** | pool_head, | |||
size_t | needed | |||
) |
Definition at line 1648 of file utils.c.
References add_string_pool(), ast_alignof, ast_assert, ast_make_room_for, AST_STRING_FIELD_ALLOCATION, and ast_string_field_mgr::last_alloc.
Referenced by __ast_string_field_ptr_build_va().
01650 { 01651 char *result = NULL; 01652 size_t space = (*pool_head)->size - (*pool_head)->used; 01653 size_t to_alloc; 01654 01655 /* Make room for ast_string_field_allocation and make it a multiple of that. */ 01656 to_alloc = ast_make_room_for(needed, ast_string_field_allocation); 01657 ast_assert(to_alloc % ast_alignof(ast_string_field_allocation) == 0); 01658 01659 if (__builtin_expect(to_alloc > space, 0)) { 01660 size_t new_size = (*pool_head)->size; 01661 01662 while (new_size < to_alloc) { 01663 new_size *= 2; 01664 } 01665 01666 #if defined(__AST_DEBUG_MALLOC) 01667 if (add_string_pool(mgr, pool_head, new_size, mgr->owner_file, mgr->owner_line, mgr->owner_func)) 01668 return NULL; 01669 #else 01670 if (add_string_pool(mgr, pool_head, new_size, __FILE__, __LINE__, __FUNCTION__)) 01671 return NULL; 01672 #endif 01673 } 01674 01675 /* pool->base is always aligned (gcc aligned attribute). We ensure that 01676 * to_alloc is also a multiple of ast_alignof(ast_string_field_allocation) 01677 * causing result to always be aligned as well; which in turn fixes that 01678 * AST_STRING_FIELD_ALLOCATION(result) is aligned. */ 01679 result = (*pool_head)->base + (*pool_head)->used; 01680 (*pool_head)->used += to_alloc; 01681 (*pool_head)->active += needed; 01682 result += ast_alignof(ast_string_field_allocation); 01683 AST_STRING_FIELD_ALLOCATION(result) = needed; 01684 mgr->last_alloc = result; 01685 01686 return result; 01687 }
int __ast_string_field_init | ( | struct ast_string_field_mgr * | mgr, | |
struct ast_string_field_pool ** | pool_head, | |||
int | needed, | |||
const char * | file, | |||
int | lineno, | |||
const char * | func | |||
) |
Definition at line 1581 of file utils.c.
References ast_string_field_pool::active, add_string_pool(), ast_free, ast_log(), ast_string_field_mgr::embedded_pool, ast_string_field_mgr::last_alloc, LOG_WARNING, ast_string_field_pool::prev, and ast_string_field_pool::used.
01583 { 01584 const char **p = (const char **) pool_head + 1; 01585 struct ast_string_field_pool *cur = NULL; 01586 struct ast_string_field_pool *preserve = NULL; 01587 01588 /* clear fields - this is always necessary */ 01589 while ((struct ast_string_field_mgr *) p != mgr) { 01590 *p++ = __ast_string_field_empty; 01591 } 01592 01593 mgr->last_alloc = NULL; 01594 #if defined(__AST_DEBUG_MALLOC) 01595 mgr->owner_file = file; 01596 mgr->owner_func = func; 01597 mgr->owner_line = lineno; 01598 #endif 01599 if (needed > 0) { /* allocate the initial pool */ 01600 *pool_head = NULL; 01601 mgr->embedded_pool = NULL; 01602 return add_string_pool(mgr, pool_head, needed, file, lineno, func); 01603 } 01604 01605 /* if there is an embedded pool, we can't actually release *all* 01606 * pools, we must keep the embedded one. if the caller is about 01607 * to free the structure that contains the stringfield manager 01608 * and embedded pool anyway, it will be freed as part of that 01609 * operation. 01610 */ 01611 if ((needed < 0) && mgr->embedded_pool) { 01612 needed = 0; 01613 } 01614 01615 if (needed < 0) { /* reset all pools */ 01616 cur = *pool_head; 01617 } else if (mgr->embedded_pool) { /* preserve the embedded pool */ 01618 preserve = mgr->embedded_pool; 01619 cur = *pool_head; 01620 } else { /* preserve the last pool */ 01621 if (*pool_head == NULL) { 01622 ast_log(LOG_WARNING, "trying to reset empty pool\n"); 01623 return -1; 01624 } 01625 preserve = *pool_head; 01626 cur = preserve->prev; 01627 } 01628 01629 if (preserve) { 01630 preserve->prev = NULL; 01631 preserve->used = preserve->active = 0; 01632 } 01633 01634 while (cur) { 01635 struct ast_string_field_pool *prev = cur->prev; 01636 01637 if (cur != preserve) { 01638 ast_free(cur); 01639 } 01640 cur = prev; 01641 } 01642 01643 *pool_head = preserve; 01644 01645 return 0; 01646 }
void __ast_string_field_ptr_build | ( | struct ast_string_field_mgr * | mgr, | |
struct ast_string_field_pool ** | pool_head, | |||
ast_string_field * | ptr, | |||
const char * | format, | |||
... | ||||
) |
Definition at line 1792 of file utils.c.
References __ast_string_field_ptr_build_va().
01795 { 01796 va_list ap1, ap2; 01797 01798 va_start(ap1, format); 01799 va_start(ap2, format); /* va_copy does not exist on FreeBSD */ 01800 01801 __ast_string_field_ptr_build_va(mgr, pool_head, ptr, format, ap1, ap2); 01802 01803 va_end(ap1); 01804 va_end(ap2); 01805 }
void __ast_string_field_ptr_build_va | ( | struct ast_string_field_mgr * | mgr, | |
struct ast_string_field_pool ** | pool_head, | |||
ast_string_field * | ptr, | |||
const char * | format, | |||
va_list | a1, | |||
va_list | a2 | |||
) |
Definition at line 1732 of file utils.c.
References __ast_string_field_alloc_space(), __ast_string_field_empty, __ast_string_field_release_active(), ast_align_for, ast_alignof, ast_make_room_for, AST_STRING_FIELD_ALLOCATION, available(), and ast_string_field_mgr::last_alloc.
Referenced by __ast_string_field_ptr_build().
01735 { 01736 size_t needed; 01737 size_t available; 01738 size_t space = (*pool_head)->size - (*pool_head)->used; 01739 ssize_t grow; 01740 char *target; 01741 01742 /* if the field already has space allocated, try to reuse it; 01743 otherwise, try to use the empty space at the end of the current 01744 pool 01745 */ 01746 if (*ptr != __ast_string_field_empty) { 01747 target = (char *) *ptr; 01748 available = AST_STRING_FIELD_ALLOCATION(*ptr); 01749 if (*ptr == mgr->last_alloc) { 01750 available += space; 01751 } 01752 } else { 01753 /* pool->used is always a multiple of ast_alignof(ast_string_field_allocation) 01754 * so we don't need to re-align anything here. 01755 */ 01756 target = (*pool_head)->base + (*pool_head)->used + ast_alignof(ast_string_field_allocation); 01757 available = space - ast_alignof(ast_string_field_allocation); 01758 } 01759 01760 needed = vsnprintf(target, available, format, ap1) + 1; 01761 01762 if (needed > available) { 01763 /* the allocation could not be satisfied using the field's current allocation 01764 (if it has one), or the space available in the pool (if it does not). allocate 01765 space for it, adding a new string pool if necessary. 01766 */ 01767 if (!(target = (char *) __ast_string_field_alloc_space(mgr, pool_head, needed))) { 01768 return; 01769 } 01770 vsprintf(target, format, ap2); 01771 __ast_string_field_release_active(*pool_head, *ptr); 01772 *ptr = target; 01773 } else if (*ptr != target) { 01774 /* the allocation was satisfied using available space in the pool, but not 01775 using the space already allocated to the field 01776 */ 01777 __ast_string_field_release_active(*pool_head, *ptr); 01778 mgr->last_alloc = *ptr = target; 01779 AST_STRING_FIELD_ALLOCATION(target) = needed; 01780 (*pool_head)->used += ast_make_room_for(needed, ast_string_field_allocation); 01781 (*pool_head)->active += needed; 01782 } else if ((grow = (needed - AST_STRING_FIELD_ALLOCATION(*ptr))) > 0) { 01783 /* the allocation was satisfied by using available space in the pool *and* 01784 the field was the last allocated field from the pool, so it grew 01785 */ 01786 AST_STRING_FIELD_ALLOCATION(*ptr) += grow; 01787 (*pool_head)->used += ast_align_for(grow, ast_string_field_allocation); 01788 (*pool_head)->active += grow; 01789 } 01790 }
int __ast_string_field_ptr_grow | ( | struct ast_string_field_mgr * | mgr, | |
struct ast_string_field_pool ** | pool_head, | |||
size_t | needed, | |||
const ast_string_field * | ptr | |||
) |
Definition at line 1689 of file utils.c.
References AST_STRING_FIELD_ALLOCATION, and ast_string_field_mgr::last_alloc.
01692 { 01693 ssize_t grow = needed - AST_STRING_FIELD_ALLOCATION(*ptr); 01694 size_t space = (*pool_head)->size - (*pool_head)->used; 01695 01696 if (*ptr != mgr->last_alloc) { 01697 return 1; 01698 } 01699 01700 if (space < grow) { 01701 return 1; 01702 } 01703 01704 (*pool_head)->used += grow; 01705 (*pool_head)->active += grow; 01706 AST_STRING_FIELD_ALLOCATION(*ptr) += grow; 01707 01708 return 0; 01709 }
void __ast_string_field_release_active | ( | struct ast_string_field_pool * | pool_head, | |
const ast_string_field | ptr | |||
) |
Definition at line 1711 of file utils.c.
References ast_string_field_pool::active, ast_free, AST_STRING_FIELD_ALLOCATION, and ast_string_field_pool::prev.
Referenced by __ast_string_field_ptr_build_va().
01713 { 01714 struct ast_string_field_pool *pool, *prev; 01715 01716 if (ptr == __ast_string_field_empty) { 01717 return; 01718 } 01719 01720 for (pool = pool_head, prev = NULL; pool; prev = pool, pool = pool->prev) { 01721 if ((ptr >= pool->base) && (ptr <= (pool->base + pool->size))) { 01722 pool->active -= AST_STRING_FIELD_ALLOCATION(ptr); 01723 if ((pool->active == 0) && prev) { 01724 prev->prev = pool->prev; 01725 ast_free(pool); 01726 } 01727 break; 01728 } 01729 } 01730 }
const char* __ast_string_field_empty |
Definition at line 1526 of file utils.c.
Referenced by __ast_calloc_with_stringfields(), and __ast_string_field_ptr_build_va().