CMAP_DEC(3)					    Corosync Cluster Engine Programmer's Manual 				       CMAP_DEC(3)

NAME

       cmap_inc - Decrease already stored value in CMAP

SYNOPSIS

       #include <corosync/cmap.h>

       cs_error_t cmap_dec (cmap_handle_t handle, const char *key_name);

DESCRIPTION

       The  cmap_dec function is used to decrease integer value of already stored key inside cmap. The handle argument is connection to CMAP data-
       base obtained by calling cmap_initialize(3) function.  key_name is name of key to increase value of.

       Function is defined only on values where increase makes sense and is well defined, so it can be one of:

       CMAP_VALUETYPE_INT8 - 8-bit signed interger

       CMAP_VALUETYPE_UINT8 - 8-bit unsigned integer

       CMAP_VALUETYPE_INT16 - 16-bit signed interger

       CMAP_VALUETYPE_UINT16 - 16-bit unsigned integer

       CMAP_VALUETYPE_INT32 - 32-bit signed interger

       CMAP_VALUETYPE_UINT32 - 32-bit unsigned integer

       CMAP_VALUETYPE_INT64 - 64-bit signed interger

       CMAP_VALUETYPE_UINT64 - 64-bit unsigned integer

       Overflow/underflow is not detected and it's ignored.

RETURN VALUE

       This call returns the CS_OK value if successful. If value or key_name are unspecified, CS_ERR_INVALID_PARAM is  returned.  CS_ERR_NOT_EXIST
       error  is  returned  if	key  doesn't exist (wasn't created by calling cmap_set(3) first). Some of keys may be tagged read-only directly in
       corosync and seting such key will result in CS_ERR_ACCESS error.

SEE ALSO

       cmap_get(3), cmap_set(3), cmap_initialize(3), cmap_overview(8)

       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 inturrupted by a signal

       CS_ERR_NOT_SUPPORTED The requested protocol/functuality not supported

       CS_ERR_MESSAGE_ERROR Incorrect auth message received

       CS_ERR_NO_MEMORY Not enough memory to completed the requested task

corosync Man Page						    03/02/2012							       CMAP_DEC(3)