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

 

                 

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c7/smi_pshm.c File Reference

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Detailed Description

SMI - POSIX shared memory [Sec. 7.14.2].

Definition in file smi_pshm.c.

Go to the source code of this file.

Compounds
struct	shared_mem
struct	SMIQ_PSHM
struct	SMIQ_PSHM::client
Defines
#define	_P1003_1B_VISIBLE
#define	MAX_CLIENTS   50
#define	MEM_SIZE(s)   (sizeof(struct shared_mem) - sizeof(struct smi_msg) + (s))
#define	SEMI_READ   0
#define	SEMI_WRITE   1
#define	SEMI_DESTROY   2
#define	SEMI_POST   1
#define	SEMI_WAIT   -1
Functions
void	mkshm_name_server (const SMIQ_PSHM *p, char *shmname, size_t shmname_max)
void	mkshm_name_client (pid_t pid, char *shmname, size_t shmname_max)
int	op_semi (struct shared_mem *m, int sem_num, int sem_op)
client *	get_client (SMIQ_PSHM *p, pid_t pid)
SMIQ *	smi_open_pshm (const char *name, SMIENTITY entity, size_t msgsize)
bool	smi_close_pshm (SMIQ *sqp)
bool	smi_send_getaddr_pshm (SMIQ *sqp, struct client_id *client, void **addr)
bool	smi_send_release_pshm (SMIQ *sqp)
bool	smi_receive_getaddr_pshm (SMIQ *sqp, void **addr)
bool	smi_receive_release_pshm (SMIQ *sqp)

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Define Documentation

#define _P1003_1B_VISIBLE

Definition at line 31 of file smi_pshm.c.

#define MAX_CLIENTS   50

Definition at line 49 of file smi_pshm.c.

#define MEM_SIZE (  s   )     (sizeof(struct shared_mem) - sizeof(struct smi_msg) + (s))

Definition at line 65 of file smi_pshm.c. Referenced by get_client(), smi_close_pshm(), and smi_open_pshm().

#define SEMI_DESTROY   2

Definition at line 82 of file smi_pshm.c. Referenced by op_semi(), and smi_close_pshm().

#define SEMI_POST   1

Definition at line 83 of file smi_pshm.c. Referenced by init_semi(), op_semi(), smi_receive_release_pshm(), smi_receive_release_shm(), smi_send_release_pshm(), and smi_send_release_shm().

#define SEMI_READ   0

Definition at line 80 of file smi_pshm.c. Referenced by init_semi(), smi_close_pshm(), smi_receive_getaddr_pshm(), smi_receive_getaddr_shm(), smi_send_release_pshm(), and smi_send_release_shm().

#define SEMI_WAIT   -1

Definition at line 84 of file smi_pshm.c. Referenced by op_semi(), smi_receive_getaddr_pshm(), smi_receive_getaddr_shm(), smi_send_getaddr_pshm(), and smi_send_getaddr_shm().

#define SEMI_WRITE   1

Definition at line 81 of file smi_pshm.c. Referenced by init_semi(), op_semi(), smi_close_pshm(), smi_open_shm(), smi_receive_release_pshm(), smi_receive_release_shm(), smi_send_getaddr_pshm(), and smi_send_getaddr_shm().

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Function Documentation

struct client* get_client (  SMIQ_PSHM *  p, pid_t  pid )  [static]

Definition at line 111 of file smi_pshm.c. References EC_CLEANUP_BGN, EC_CLEANUP_END, ec_cmp, EC_FAIL, ec_neg1, errno, get_client(), MAX_CLIENTS, MEM_SIZE, mkshm_name_client(), mmap(), PERM_FILE, SERVER_NAME_MAX, and shm_open(). Referenced by get_client(), smi_send_getaddr_pshm(), and smi_send_release_pshm().

void mkshm_name_client (  pid_t  pid, char *  shmname, size_t  shmname_max )  [static]

Definition at line 74 of file smi_pshm.c. Referenced by get_client(), smi_close_pshm(), and smi_open_pshm().

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

Definition at line 68 of file smi_pshm.c. References SMIQ_PSHM::sq_name.

int op_semi (  struct shared_mem *  m, int  sem_num, int  sem_op )  [static]

Definition at line 86 of file smi_pshm.c. References EC_CLEANUP_BGN, EC_CLEANUP_END, ec_neg1, sem_destroy(), sem_post(), sem_t, sem_wait(), SEMI_DESTROY, SEMI_POST, SEMI_WAIT, SEMI_WRITE, shared_mem::sm_sem_r, and shared_mem::sm_sem_w.

bool smi_close_pshm (  SMIQ *  sqp  )

Definition at line 202 of file smi_pshm.c. References SMIQ_PSHM::client::cl_fd, SMIQ_PSHM::client::cl_mem, SMIQ_PSHM::client::cl_pid, close(), MAX_CLIENTS, MEM_SIZE, mkshm_name_client(), mkshm_name_server(), munmap(), op_semi(), SEMI_DESTROY, SEMI_READ, SEMI_WRITE, SERVER_NAME_MAX, shm_unlink(), SMI_CLIENT, SMI_SERVER, SMIQ_PSHM::sq_clients, SMIQ_PSHM::sq_entity, SMIQ_PSHM::sq_msgsize, SMIQ_PSHM::sq_srv_fd, and SMIQ_PSHM::sq_srv_mem. Referenced by smi_open_pshm().

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

Definition at line 143 of file smi_pshm.c. References SMIQ_PSHM::client::cl_fd, SMIQ_PSHM::client::cl_mem, close(), EC_CLEANUP_BGN, EC_CLEANUP_END, ec_cmp, EC_FAIL, ec_neg1, ec_null, errno, ftruncate(), getpid(), MEM_SIZE, mkshm_name_client(), mkshm_name_server(), mmap(), PERM_FILE, sem_init(), SERVER_NAME_MAX, shm_open(), shm_unlink(), shared_mem::sm_sem_r, shared_mem::sm_sem_w, smi_close_pshm(), SMI_SERVER, SMIQ, SMIQ_PSHM::sq_clients, SMIQ_PSHM::sq_entity, SMIQ_PSHM::sq_msgsize, SMIQ_PSHM::sq_name, SMIQ_PSHM::sq_srv_fd, and SMIQ_PSHM::sq_srv_mem.

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

Definition at line 286 of file smi_pshm.c. References SMIQ_PSHM::client::cl_mem, EC_CLEANUP_BGN, EC_CLEANUP_END, ec_neg1, op_semi(), SEMI_READ, SEMI_WAIT, shared_mem::sm_msg, SMI_SERVER, SMIQ_PSHM::sq_clients, SMIQ_PSHM::sq_entity, and SMIQ_PSHM::sq_srv_mem.

bool smi_receive_release_pshm (  SMIQ *  sqp  )

Definition at line 304 of file smi_pshm.c. References SMIQ_PSHM::client::cl_mem, EC_CLEANUP_BGN, EC_CLEANUP_END, ec_neg1, op_semi(), SEMI_POST, SEMI_WRITE, SMI_SERVER, SMIQ_PSHM::sq_clients, SMIQ_PSHM::sq_entity, and SMIQ_PSHM::sq_srv_mem.

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

Definition at line 241 of file smi_pshm.c. References smi_msg::client_id::c_id1, EC_CLEANUP_BGN, EC_CLEANUP_END, ec_neg1, ec_null, get_client(), getpid(), op_semi(), SEMI_WAIT, SEMI_WRITE, shared_mem::sm_msg, SMI_CLIENT, smi_msg::smi_client, SMI_SERVER, SMIQ_PSHM::sq_client, SMIQ_PSHM::sq_entity, and SMIQ_PSHM::sq_srv_mem.

bool smi_send_release_pshm (  SMIQ *  sqp  )

Definition at line 266 of file smi_pshm.c. References EC_CLEANUP_BGN, EC_CLEANUP_END, ec_neg1, ec_null, get_client(), op_semi(), SEMI_POST, SEMI_READ, SMI_SERVER, SMIQ_PSHM::sq_client, SMIQ_PSHM::sq_entity, and SMIQ_PSHM::sq_srv_mem.

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