initial shared memory working

1 files changed, 18 insertions, 0 deletions

diff --git a/include/apos/mem_regions.h b/include/apos/mem_regions.h
index b94d15a..7231dbd 100644
--- a/include/apos/mem_regions.h
+++ b/include/apos/mem_regions.h
@@ -85,6 +85,9 @@ 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;
 
@@ -125,6 +128,21 @@ vm_t alloc_region(struct mem_region_root *r, size_t size, size_t *actual_size,
                   vmflags_t flags);
 
 /**
+ * Allocate memory region and associate it with some other process.
+ * Will allocate region of at least \c size bytes, with best possible location.
+ *
+ * @param r Memory region root.
+ * @param size Size of region to allocate.
+ * @param actual_size Size of region that was allocated.
+ * @param flags Memory flags.
+ * @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);
+
+/**
  * Allocate fixed memory region.
  * Will allocate region that is at least \c size bytes, and includes \c start.
  * \note The address returned might not be the address requested, and the caller