Descriptor for an Ach channel. More...

#include <ach.h>

Data Fields
union {
struct {
struct ach_header * shm
	pointer to mmap'ed block

size_t len
	length of memory mapping

int fd
	file descriptor of mmap'ed file

union {
uint64_t seq_num
	last sequence number read

achk_opt_t k_opts
	Used by kernel devices.

}

size_t next_index
	next index entry to try get from

clockid_t clock
	attributes used to create this channel

volatile sig_atomic_t cancel
	cancel a waiting ach_get

const struct ach_channel_vtab * vtab
	virtual method table

int fd_source_lock
	file descriptor for source lock

}

uint64_t reserved [16]
	Reserve space to compatibly add future options.

};

Detailed Description

Descriptor for an Ach channel.

Warning: This method may not be threadsafe. If library clients need to access the same channel from different threads, either open the channel with separate struct ach_channel desciptors for each thread, or synchronize access to the same descriptor.

Library users are strongly discourged from directly accessing members of this structure; its fields may change in future library versions. All access should be through the provided library functions.

The documentation for this struct was generated from the following file:

include/ach.h

Data Fields

Detailed Description