msgdsize(9r) [osf1 man page]

msgdsize(9r)															      msgdsize(9r)

NAME

       msgdsize - STREAMS: Returns the number of bytes in a message

SYNOPSIS

       #include <sys/stream.h>

       int msgdsize(
	       MBLKP message_block_ptr );

ARGUMENTS

       Specifies a pointer to the message block to be evaluated.  The typedef MBLKP is an alternate name for typedef struct msgb *.

DESCRIPTION

       The  msgdsize  interface counts the number of bytes in a data message. Only bytes included in the data blocks with a message type of M_DATA
       (ordinary data) is included in the count.

RETURN VALUES

       Upon successful completion, the msgdsize interface returns the number of data bytes in a message, expressed as an integer.

																      msgdsize(9r)

freeb(9r)																 freeb(9r)

NAME

       freeb - STREAMS: Frees a message block

SYNOPSIS

       #include <sys/stream.h>

       void freeb(
	       MBLKP message_block_ptr );

ARGUMENTS

       Specifies a pointer to the message block to be deallocated.  The typedef MBLKP is an alternate name for typedef struct msgb *.

DESCRIPTION

       The  freeb  interface  deallocates a message block.  If the reference count of the db_ref member of the datab structure is greater than the
       value 1, freeb decrements the count. If db_ref equals the value 1, freeb deallocates the message block and the corresponding data block and
       buffer.

       If  the	data buffer to be freed was allocated in a call to the esballoc interface, the buffer may be a non-STREAMS resource. In that case,
       the driver must be notified that the attached data buffer needs to be freed by calling the driver's freeing interface. To make this process
       independent  of	the driver used in the stream, freeb finds the free_rtn structure associated with the buffer.  The free_rtn structure con-
       tains a pointer to the driver-independent interface that releases the buffer.  Once  this  is  accomplished,  freeb  releases  the  STREAMS
       resources associated with the buffer.

RETURN VALUES

       None

SEE ALSO

       Kernel Interfaces: allocb(9r), dupb(9r), esballoc(9r)

       Programmer's Guide: STREAMS

																	 freeb(9r)