.IX \f4brelse\fP(D3DK)

NAME

brelse − return a buffer to the system’s free list

SYNOPSIS

#include <sys/types.h>
#include <sys/buf.h>
void brelse(struct buf ∗bp);

ARGUMENTS

bpPointer to the buffer header. 

DESCRIPTION

The brelse function returns the buffer specified by bp to the system’s buffer free list.  If there were any processes waiting for this specific buffer to become free, or for any buffer to become available on the free list, one is awakened.  The buffer specified by bp must have been previously allocated by a call to geteblk(D3DK) or ngeteblk(D3DK).  brelse may not be called to release a buffer which has been allocated by any other means. 

RETURN VALUE

None. 

LEVEL

Base or Interrupt. 

NOTES

Does not sleep. 

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

SEE ALSO

clrbuf(D3DK), biodone(D3DK), biowait(D3DK), geteblk(D3DK), ngeteblk(D3DK), buf(D4DK)

DDI/DKI