Allocates message and data blocks.
struct msgb *
allocb(size, pri)
register int size;
uint pri;
The allocb utility allocates blocks for a message. When a message is allocated in this manner, the b_band field of the mblk_t structure is initially set to a value of 0. Modules and drivers can set this field.
| size | Specifies the minimum number of bytes needed in the data buffer. |
| pri | Specifies the relative importance of the allocated blocks to the module. The possible values are: |
The allocb utility returns a pointer to a message block of type M_DATA in which the data buffer contains at least the number of bytes specified by the size parameter. If a block cannot be allocated as requested, the allocb utility returns a null pointer.
This utility is part of STREAMS Kernel Extensions.
The esballoc utility.
List of Streams Programming References and Understanding STREAMS Messages in AIX 5L Version 5.1 Communications Programming Concepts.