SVR5

rmsetwant(D3)

rmsetwant -- set the map's wait flag for a wakeup

Synopsis (Not in current DDI version)

   #include <sys/map.h>
   #include <sys/ddi.h>
   
   void rmsetwant(struct map *mp);

Description

The rmsetwant function increments the counter on the wait flag of the map pointed to by mp.

Arguments

mp: Pointer to the map from which the driver is waiting for space.

Return values

None

Usage

rmsetwant is typically called from the driver after an unsuccessful attempt to allocate space from the map using rmalloc(D3).

The driver should sleep on mp after calling rmsetwant. When the rmfree(D3) function returns space to the map, it wakes up any processes waiting for space.

Context and synchronization

User or blockable context.

Examples

See rmalloc(D3) for an example of rmsetwant.

Hardware applicability

All

Version applicability

ddi: 1, 2, 4

Differences between versions

rmalloc_wait(D3) replaces rmsetwant.

References

rmalloc(D3), rmalloc_wait(D3), rmfree(D3), rminit(D3)