diff options
Diffstat (limited to 'include/apos/mem_regions.h')
| -rw-r--r-- | include/apos/mem_regions.h | 41 |
1 files changed, 19 insertions, 22 deletions
diff --git a/include/apos/mem_regions.h b/include/apos/mem_regions.h index 7231dbd..6fdb5b4 100644 --- a/include/apos/mem_regions.h +++ b/include/apos/mem_regions.h @@ -32,22 +32,6 @@ #define is_region_used(r) is_set(r->flags, MR_USED) /** - * Check if region is owned. - * - * @param r Memory region to check. - * @return \c 0 if not owned, non-zero otherwise. - */ -#define is_region_owned(r) is_set(r->flags, MR_OWNED) - -/** - * Check if region is shared. - * - * @param r Memory region to check. - * @return \c 0 if not shared, non-zero otherwise. - */ -#define is_region_shared(r) is_set(r->flags, MR_SHARED) - -/** * Check if region should be kept during clear. * * @param r Memory region to check. @@ -85,14 +69,18 @@ struct mem_region { * MR_SHARED, MR_OWNED, MR_COW, MR_KEEP. */ vmflags_t flags; - /** In shared regions, mark the other pid that shared the region. */ - id_t pid; - /** End address of memory region. */ vm_t end; /** Start address of memory region. */ vm_t start; + + /** In shared regions, mark the other pid that shared the region. */ + id_t pid; + + /** In shared regions, this is the address associated with region in the + * other process. */ + vm_t alt_va; }; /** @@ -138,9 +126,9 @@ vm_t alloc_region(struct mem_region_root *r, size_t size, size_t *actual_size, * @param pid Process to associate with region. * @return Address of allocated region on success, otherwise \c NULL. */ -stat_t alloc_shared_region(struct mem_region_root *r, size_t size, - size_t *actual_size, - vmflags_t flags, id_t pid); +vm_t alloc_shared_region(struct mem_region_root *r, size_t size, + size_t *actual_size, + vmflags_t flags, id_t pid); /** * Allocate fixed memory region. @@ -268,6 +256,15 @@ stat_t stat_region(struct mem_region_root *r, vm_t va, vmflags_t *flags); stat_t mod_region(struct mem_region_root *r, vm_t va, vmflags_t flags); /** + * Set alternate virtual address associated with shared memory region in other process. + * + * @param r Memory region root. + * @param va Virtual address in \p r. + * @param alt_va Virtual address in other process. + */ +void set_alt_region_addr(struct mem_region_root *r, vm_t va, vm_t alt_va); + +/** * Conversion function between abstract memory region and actual page mappings. * Assumes that pages of some order are mappable at multiples of their size, and * tries to fit as many and as high order pages as it can into the region. |