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msgsize(9f) [opensolaris man page]

msgsize(9F)						   Kernel Functions for Drivers 					       msgsize(9F)

msgsize - Return the total number of bytes in a message SYNOPSIS
#include <sys/stream.h> #include <sys/strsun.h> size_t msgsize(mblk_t *mp); INTERFACE LEVEL
Solaris DDI specific (Solaris DDI) PARAMETERS
mp Message to be evaluated. DESCRIPTION
The msgsize() function counts the number of bytes in a message, regardless of the data type of the underlying data blocks. RETURN VALUES
Number of bytes in the message. CONTEXT
This function can be called from user, kernel or interrupt context. SEE ALSO
msgdsize(9F) STREAMS Programming Guide SunOS 5.11 9 June 2004 msgsize(9F)

Check Out this Related Man Page

allocb_tmpl(9F) 					   Kernel Functions for Drivers 					   allocb_tmpl(9F)

allocb_tmpl - allocate a message block using a template SYNOPSIS
#include <sys/stream.h> mblk_t *allocb_tmpl(size_t size, const mblk_t *tmpl); INTERFACE LEVEL
Solaris DDI specific (Solaris DDI) PARAMETERS
size The number of bytes in the message block. tmpl The template message block. DESCRIPTION
The allocb_tmpl() function tries to allocate a STREAMS message block using allocb(9F). If the allocation is successful, the db_type field in the the data block structure (dblk_t, see datab(9S)), as well as some implementation-private data, are copied from the dblk_t associated with tmpl. allocb_tmpl() should be used when a new STREAMS message block is allocated. This block is then used to contain data derived from another STREAMS message block. The original message is used as the tmpl argument. RETURN VALUES
Upon success, allocb_tmpl() returns a pointer to the allocated message block of the same type as tmpl. On failure, allocb_tmpl() returns a NULL pointer. CONTEXT
allocb_tmpl() can be called from user or interrupt context. SEE ALSO
allocb(9F), datab(9S), msgb(9S) Writing Device Drivers STREAMS Programming Guide SunOS 5.10 18 Feb 2003 allocb_tmpl(9F)
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