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Diffstat (limited to '')
-rw-r--r-- | c/src/exec/score/src/objectlocaliterate.c | 77 |
1 files changed, 77 insertions, 0 deletions
diff --git a/c/src/exec/score/src/objectlocaliterate.c b/c/src/exec/score/src/objectlocaliterate.c new file mode 100644 index 0000000000..e4b0f28de8 --- /dev/null +++ b/c/src/exec/score/src/objectlocaliterate.c @@ -0,0 +1,77 @@ +/* + * object iterator + * + * + * COPYRIGHT (c) 2000. + * On-Line Applications Research Corporation (OAR). + * + * The license and distribution terms for this file may be + * found in found in the file LICENSE in this distribution or at + * http://www.OARcorp.com/rtems/license.html. + * + * $Id$ + */ + +#include <rtems/system.h> +#include <rtems/score/object.h> + +/*PAGE + * + * _Objects_Local_iterate + * + * DESCRIPTION: + * + * This function invokes the callback function for each existing object + * of the type specified by the information block pointer. Iteration + * continues until either all objects have been processed, or, if + * break_on_error is TRUE, until an invocation of the callback returns + * something other than 0. + * + * Input parameters: + * information: + * A pointer to an Objects_Information block. Determines the type of + * object over which to iterate. + * callback: + * A pointer to a function with the indicated signature. + * arg: + * A pointer to some arbitrary entity. Passed on to the callback. + * break_on_error + * If TRUE, stop iterating on error. + * + * Output parameters: NONE + * But callback may write into space pointed to by arg. + * + * Return value: + * 0 if successful + * Value returned by the callback otherwise. + */ + +unsigned32 _Objects_Local_iterate( + Objects_Information *information, + unsigned32 (*callback)(Objects_Control *object, void * arg), + void *arg, + boolean break_on_error +) +{ + unsigned32 result; + unsigned32 i; + Objects_Control *the_object; + + if ( !information ) + return 0; + + if ( !callback ) + return 0; + + for( i = 1; i <= information->maximum; i++ ) { + the_object = (Objects_Control *)information->local_table[i]; + if( the_object ) { + result = (*callback)( the_object, arg ); + if ( result && break_on_error ) + return result; + } + } + + return 0; +} + |