StRoot: RTS/include/SUNRT/shmLib.h Source File

00001 #ifndef SHMLIB_HH
00002 #define SHMLIB_HH
00003 
00004 /*****************************************************************
00005  * To use:
00006  *          1. Mother of all tasks createShmSegment() for each segment
00007  *         
00008  *          2. Each tasks calls getShmPtr() to attach
00009  *
00010  *          3. After a task has called getShmPtr() for a segment it
00011  *             may call getShmAttributes()
00012  *****************************************************************/
00013 #define SHM_KEY_BASE 0xfd000000
00014 #define MAX_SEGMENTS 10
00015 
00016 struct ShmAttributes
00017 {
00018   int key;
00019   int segment;
00020   int size;
00021   int shmid;
00022   char *ptr;
00023 };
00024 
00025 int createShmSegment(int seg, int size);
00026 char *getShmPtr(int seg, int offset);
00027 ShmAttributes *getShmAttributes(int seg);
00028 
00029 #endif