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Annotation of XNU/osfmk/kern/etap_pool.h, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
        !             3:  *
        !             4:  * @APPLE_LICENSE_HEADER_START@
        !             5:  * 
        !             6:  * The contents of this file constitute Original Code as defined in and
        !             7:  * are subject to the Apple Public Source License Version 1.1 (the
        !             8:  * "License").  You may not use this file except in compliance with the
        !             9:  * License.  Please obtain a copy of the License at
        !            10:  * http://www.apple.com/publicsource and read it before using this file.
        !            11:  * 
        !            12:  * This Original Code and all software distributed under the License are
        !            13:  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
        !            14:  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
        !            15:  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
        !            16:  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
        !            17:  * License for the specific language governing rights and limitations
        !            18:  * under the License.
        !            19:  * 
        !            20:  * @APPLE_LICENSE_HEADER_END@
        !            21:  */
        !            22: /*
        !            23:  * @OSF_COPYRIGHT@
        !            24:  * 
        !            25:  */
        !            26: /*
        !            27:  * HISTORY
        !            28:  * 
        !            29:  * Revision 1.1.1.1  1998/09/22 21:05:34  wsanchez
        !            30:  * Import of Mac OS X kernel (~semeria)
        !            31:  *
        !            32:  * Revision 1.1.1.1  1998/03/07 02:25:54  wsanchez
        !            33:  * Import of OSF Mach kernel (~mburg)
        !            34:  *
        !            35:  * Revision 1.1.2.4  1995/10/09  17:13:55  devrcs
        !            36:  *     Merged RT3_SHARED version into `mainline.'
        !            37:  *     [1995/09/13  16:17:31  joe]
        !            38:  *
        !            39:  * Revision 1.1.2.3  1995/09/18  19:13:40  devrcs
        !            40:  *     Merged RT3_SHARED version into `mainline.'
        !            41:  *     [1995/09/13  16:17:31  joe]
        !            42:  * 
        !            43:  * Revision 1.1.2.2  1995/01/10  05:11:19  devrcs
        !            44:  *     mk6 CR801 - new file for mk6_shared from cnmk_shared.
        !            45:  *     [1994/12/01  21:11:51  dwm]
        !            46:  * 
        !            47:  * Revision 1.1.2.1  1994/10/21  18:28:53  joe
        !            48:  *     Initial ETAP submission
        !            49:  *     [1994/10/20  19:31:35  joe]
        !            50:  * 
        !            51:  * $EndLog$
        !            52:  */
        !            53: /* 
        !            54:  * File : etap_pool.h
        !            55:  *
        !            56:  *       The start_data_node structure is primarily needed to hold
        !            57:  *       start information for read locks (since multiple readers
        !            58:  *       can acquire a read lock).  For consistency, however, the
        !            59:  *       structure is used for write locks as well.  Each complex
        !            60:  *       lock will maintain a linked list of these structures.
        !            61:  */
        !            62: 
        !            63: #ifndef _KERN_ETAP_POOL_H_
        !            64: #define _KERN_ETAP_POOL_H_
        !            65: 
        !            66: #include <kern/etap_options.h>
        !            67: #include <mach/etap.h>
        !            68: #include <mach/boolean.h>
        !            69: 
        !            70: #if    ETAP_LOCK_TRACE
        !            71: 
        !            72: #include <cpus.h>
        !            73: #include <mach/clock_types.h>
        !            74: #include <mach/kern_return.h>
        !            75: #include <kern/misc_protos.h>
        !            76: 
        !            77: struct start_data_node {
        !            78:        unsigned int    thread_id;           /* thread id                    */
        !            79:        etap_time_t     start_hold_time;     /* time of last acquisition     */
        !            80:        etap_time_t     start_wait_time;     /* time of first miss           */
        !            81:        unsigned int    start_pc;            /* pc of acquiring function     */
        !            82:        unsigned int    end_pc;              /* pc of relinquishing function */
        !            83:        struct start_data_node *next;        /* pointer to next list entry   */
        !            84: };
        !            85: 
        !            86: typedef struct start_data_node* start_data_node_t;
        !            87: 
        !            88: /*
        !            89:  *  The start_data_node pool is statically
        !            90:  *  allocated and privatly maintained
        !            91:  */
        !            92:  
        !            93: #define SD_POOL_ENTRIES     (NCPUS * 256)
        !            94: 
        !            95: extern  void                   init_start_data_pool(void);
        !            96: extern  start_data_node_t      get_start_data_node(void);
        !            97: extern  void                   free_start_data_node(start_data_node_t);
        !            98: 
        !            99: #else  /* ETAP_LOCK_TRACE */
        !           100: typedef boolean_t start_data_node_t;
        !           101: #define get_start_data_node()
        !           102: #define free_start_start_data_node(node)
        !           103: #endif /* ETAP_LOCK_TRACE  */
        !           104: 
        !           105: #define SD_ENTRY_NULL  ((start_data_node_t) 0)
        !           106: 
        !           107: #endif  /* _KERN_ETAP_POOL_H_ */

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