| /*************************************************************************/ |
| /* */ |
| /* Copyright (c) 1994 Stanford University */ |
| /* */ |
| /* All rights reserved. */ |
| /* */ |
| /* Permission is given to use, copy, and modify this software for any */ |
| /* non-commercial purpose as long as this copyright notice is not */ |
| /* removed. All other uses, including redistribution in whole or in */ |
| /* part, are forbidden without prior written permission. */ |
| /* */ |
| /* This software is provided with absolutely no warranty and no */ |
| /* support. */ |
| /* */ |
| /*************************************************************************/ |
| |
| /************************************************************** |
| * |
| * Definitions relevant to parallel processing |
| * |
| ***************************************************************/ |
| |
| #ifndef _PARALLEL_H |
| #define _PARALLEL_H |
| |
| |
| |
| /*************************************************************************** |
| * |
| * Shared lock variable |
| * |
| * Some machines provide only a limited number of lock variables. This |
| * data structure allows sharing of these lock variables. |
| * The shared locks are divided into 2 segments so that different types of |
| * objects are given different locks. |
| * |
| ****************************************************************************/ |
| |
| typedef struct |
| { |
| LOCKDEC(lock) |
| } Shared_Lock ; |
| |
| #define SHARED_LOCK_SEG_SIZE (MAX_SHARED_LOCK / 2) |
| |
| #define SHARED_LOCK_SEG0 (0) |
| #define SHARED_LOCK_SEG1 (1) |
| #define SHARED_LOCK_SEGANY (2) |
| |
| /**************************************************************************** |
| * |
| * Memory Consistency Model of the machine |
| * |
| * Some macro changes its behavior based on the memory consistency model |
| * |
| * |
| *****************************************************************************/ |
| |
| /* Set one(1) to the model used in the machine. Set only one of these |
| at a time */ |
| |
| #define MEM_CONSISTENCY_RELEASE (0) |
| #define MEM_CONSISTENCY_WEAK (0) |
| #define MEM_CONSISTENCY_PROCESSOR (1) |
| |
| #endif |
| |
