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Add a resource_list_reserved() method that returns true if a resource

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list entry contains a reserved resource.
This commit is contained in:
John Baldwin 2010-11-17 22:28:04 +00:00
parent 8694ea87f5
commit 144df3a28f
2 changed files with 25 additions and 0 deletions
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24
sys/kern/subr_bus.c
View File

@ -2933,6 +2933,30 @@ resource_list_busy(struct resource_list *rl, int type, int rid)
return (1);
}
/**
* @brief Determine if a resource entry is reserved.
*
* Returns true if a resource entry is reserved meaning that it has an
* associated "reserved" resource. The resource can either be
* allocated or unallocated.
*
* @param rl the resource list to search
* @param type the resource entry type (e.g. SYS_RES_MEMORY)
* @param rid the resource identifier
*
* @returns Non-zero if the entry is reserved, zero otherwise.
*/
int
resource_list_reserved(struct resource_list *rl, int type, int rid)
{
struct resource_list_entry *rle;
rle = resource_list_find(rl, type, rid);
if (rle != NULL && rle->flags & RLE_RESERVED)
return (1);
return (0);
}
/**
* @brief Find a resource entry by type and rid.
*

1
sys/sys/bus.h
View File

@ -256,6 +256,7 @@ int resource_list_add_next(struct resource_list *rl,
u_long start, u_long end, u_long count);
int resource_list_busy(struct resource_list *rl,
int type, int rid);
int resource_list_reserved(struct resource_list *rl, int type, int rid);
struct resource_list_entry*
resource_list_find(struct resource_list *rl,
int type, int rid);