©2004 by Marc J. Rochkind. All rights reserved. Portions marked "Open Source" may be copied under license.

 

                 

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c7/smi_shm.c File Reference

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Detailed Description

SMI - System V shared memory [Sec. 7.13.3].

Definition in file smi_shm.c.

Go to the source code of this file.

Compounds
union	semun
struct	SMIQ_SHM
Defines
#define	SEMI_READ   0
#define	SEMI_WRITE   1
#define	SEMI_POST   1
#define	SEMI_WAIT   -1
#define	MAX_ATTACHED   20
Functions
void	mkshm_name_server (const SMIQ_SHM *p, char *shmname, size_t shmname_max)
int	op_semi (int semid, int sem_num, int sem_op)
int	init_semi (int semid)
void *	getaddr (int shmid)
SMIQ *	smi_open_shm (const char *name, SMIENTITY entity, size_t msgsize)
bool	smi_close_shm (SMIQ *sqp)
bool	smi_send_getaddr_shm (SMIQ *sqp, struct client_id *client, void **addr)
bool	smi_send_release_shm (SMIQ *sqp)
bool	smi_receive_getaddr_shm (SMIQ *sqp, void **addr)
bool	smi_receive_release_shm (SMIQ *sqp)

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Define Documentation

#define MAX_ATTACHED   20

Definition at line 95 of file smi_shm.c. Referenced by getaddr().

#define SEMI_POST   1

Definition at line 28 of file smi_shm.c.

#define SEMI_READ   0

Definition at line 26 of file smi_shm.c.

#define SEMI_WAIT   -1

Definition at line 29 of file smi_shm.c.

#define SEMI_WRITE   1

Definition at line 27 of file smi_shm.c.

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Function Documentation

void* getaddr (  int  shmid  )  [static]

Definition at line 97 of file smi_shm.c. References clock(), EC_CLEANUP_BGN, EC_CLEANUP_END, ec_neg1, MAX_ATTACHED, shmat(), shmdt(), and time().

int init_semi (  int  semid  )  [static]

Definition at line 74 of file smi_shm.c. References EC_CLEANUP_BGN, EC_CLEANUP_END, ec_neg1, op_semi(), semctl(), SEMI_POST, SEMI_READ, SEMI_WRITE, and semun::val. Referenced by smi_open_shm().

void mkshm_name_server (  const SMIQ_SHM *  p, char *  shmname, size_t  shmname_max )  [static]

Definition at line 52 of file smi_shm.c. References SMIQ_SHM::sq_name. Referenced by smi_close_pshm(), smi_close_shm(), smi_open_pshm(), and smi_open_shm().

int op_semi (  int  semid, int  sem_num, int  sem_op )  [static]

Definition at line 58 of file smi_shm.c. References EC_CLEANUP_BGN, EC_CLEANUP_END, ec_neg1, sembuf::sem_flg, sembuf::sem_num, sembuf::sem_op, and semop(). Referenced by init_semi(), smi_close_pshm(), smi_receive_getaddr_pshm(), smi_receive_getaddr_shm(), smi_receive_release_pshm(), smi_receive_release_shm(), smi_send_getaddr_pshm(), smi_send_getaddr_shm(), smi_send_release_pshm(), and smi_send_release_shm().

bool smi_close_shm (  SMIQ *  sqp  )

Definition at line 228 of file smi_shm.c. References EC_CLEANUP_BGN, EC_CLEANUP_END, ec_neg1, getaddr(), mkshm_name_server(), SMIQ_SHM::msg_client, SMIQ_SHM::msg_server, semctl(), shmctl(), shmdt(), SMI_SERVER, SMIQ_SHM::sq_entity, SMIQ_SHM::sq_semid_client, SMIQ_SHM::sq_semid_server, SMIQ_SHM::sq_shmid_client, SMIQ_SHM::sq_shmid_server, and unlink().

SMIQ* smi_open_shm (  const char *  name, SMIENTITY  entity, size_t  msgsize )

Definition at line 154 of file smi_shm.c. References semun::buf, close(), EC_CLEANUP_BGN, EC_CLEANUP_END, EC_FAIL, ec_neg1, ec_null, errno, ftok(), init_semi(), mkshm_name_server(), SMIQ_SHM::msg_client, SMIQ_SHM::msg_server, open(), PERM_FILE, semid_ds::sem_otime, semctl(), semget(), SEMI_WRITE, SERVER_NAME_MAX, shmat(), shmctl(), shmget(), sleep(), smi_client_nowait, SMI_SERVER, SMIQ, SMIQ_SHM::sq_entity, SMIQ_SHM::sq_name, SMIQ_SHM::sq_semid_client, SMIQ_SHM::sq_semid_server, SMIQ_SHM::sq_shmid_client, and SMIQ_SHM::sq_shmid_server.

bool smi_receive_getaddr_shm (  SMIQ *  sqp, void **  addr )

Definition at line 317 of file smi_shm.c. References EC_CLEANUP_BGN, EC_CLEANUP_END, ec_neg1, SMIQ_SHM::msg_client, SMIQ_SHM::msg_server, op_semi(), SEMI_READ, SEMI_WAIT, SMI_SERVER, SMIQ_SHM::sq_entity, SMIQ_SHM::sq_semid_client, and SMIQ_SHM::sq_semid_server.

bool smi_receive_release_shm (  SMIQ *  sqp  )

Definition at line 338 of file smi_shm.c. References EC_CLEANUP_BGN, EC_CLEANUP_END, ec_neg1, op_semi(), SEMI_POST, SEMI_WRITE, SMI_SERVER, SMIQ_SHM::sq_entity, SMIQ_SHM::sq_semid_client, and SMIQ_SHM::sq_semid_server.

bool smi_send_getaddr_shm (  SMIQ *  sqp, struct client_id *  client, void **  addr )

Definition at line 274 of file smi_shm.c. References EC_CLEANUP_BGN, EC_CLEANUP_END, ec_neg1, ec_null, getaddr(), SMIQ_SHM::msg_server, op_semi(), SEMI_WAIT, SEMI_WRITE, SMI_SERVER, SMIQ_SHM::sq_client, SMIQ_SHM::sq_entity, SMIQ_SHM::sq_semid_client, SMIQ_SHM::sq_semid_server, and SMIQ_SHM::sq_shmid_client.

bool smi_send_release_shm (  SMIQ *  sqp  )

Definition at line 300 of file smi_shm.c. References EC_CLEANUP_BGN, EC_CLEANUP_END, ec_neg1, op_semi(), SEMI_POST, SEMI_READ, SMI_SERVER, SMIQ_SHM::sq_client, SMIQ_SHM::sq_entity, and SMIQ_SHM::sq_semid_server.

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