SVR5 and SCO OpenServer 5

msgdsize(D3str)

msgdsize -- return number of bytes of data in a message

Synopsis

   #include <sys/stream.h>
   #include <sys/ddi.h>
   
   int msgdsize(mblk_t *mp);

Description

msgdsize counts the number of bytes of data in the message pointed to by mp. Only bytes included in message blocks of type M_DATA(D7str) are included in the count.

Arguments

mp: Pointer to the message to be evaluated.

Return values

The number of bytes of data in the message.

Usage

Context

Base or Interrupt.

Synchronization constraints

Does not block.

Driver-defined basic locks, read/write locks, and sleep locks may be held across calls to this function.

Examples

See insq(D3str) for an example of msgdsize.

Hardware applicability

All

Version applicability

ddi: 1, 2, 3, 4, 5, 5mp, 6, 6mp, 7, 7mp, 7.1, 7.1mp, 8, 8mp
oddi: 1, 2, 2mp, 3, 3mp, 4, 4mp, 5, 5mp, 6, 6mp

References

msgb(D4str)