CPG_ZCB_ALLOC(3) Corosync Cluster Engine Programmer's Manual

NAME

cpg_zcb_alloc - Allocates a zero copy buffer

SYNOPSIS

#include <corosync/cpg.h>

int cpg_zcb_alloc(cpg_handle_t handle, size_t size, void **buffer);

DESCRIPTION

The cpg_zcb_alloc function will allocate a zero copy buffer for use
with the cpg_zcb_mcast_joined(3) function. This buffer should not be
used in another thread while a cpg_zcb_mcast_joined operation is
taking place on the buffer. The buffer is allocated via operating
system mechanisms to avoid copying in the IPC layer.


The argument handle describes the handle on which the buffer will be
allocated.

The argument size requests a buffer of size be allocated.

The buffer argument is set to the buffer address that is allocated by
this operation.

RETURN VALUE

This call returns the CS_OK value if successful, otherwise an error
is returned.

ERRORS

The errors are undocumented.

SEE ALSO

cpg_overview(8), cpg_initialize(3), cpg_finalize(3), cpg_fd_get(3),
cpg_dispatch(3), cpg_join(3), cpg_leave(3), cpg_mcast_joined(3),
cpg_membership_get(3) cpg_zcb_alloc(3) cpg_zcb_free(3)
cpg_zcb_mcast_joined(3) cpg_context_get(3) cpg_context_set(3)
cpg_local_get(3)


CS_ERR_TRY_AGAIN Resource temporarily unavailable

CS_ERR_INVALID_PARAM Invalid argument

CS_ERR_ACCESS Permission denied

CS_ERR_LIBRARY The connection failed

CS_ERR_INTERRUPT System call interrupted by a signal

CS_ERR_NOT_SUPPORTED The requested protocol/functionality not
supported

CS_ERR_MESSAGE_ERROR Incorrect auth message received

CS_ERR_NO_MEMORY Not enough memory to complete the requested task

corosync Man Page 2009-04-15 CPG_ZCB_ALLOC(3)