class AllocatorReservation
Defined at line 32 of file ../../src/storage/minfs/allocator/allocator_reservation.h
This class represents a reservation from an Allocator to save a particular number of reserved
elements for later allocation. Allocation for reserved elements must be done through the
AllocatorReservation class.
This class is thread-compatible.
This class is not assignable, copyable, or moveable.
Public Methods
void AllocatorReservation (Allocator * allocator)Defined at line 15 of file ../../src/storage/minfs/allocator/allocator_reservation.cc
void ~AllocatorReservation ()Defined at line 16 of file ../../src/storage/minfs/allocator/allocator_reservation.cc
zx::result<> Reserve (PendingWork * transaction, size_t reserved)Returns |ZX_OK| when |allocator| reserves |reserved| elements and |this| is successfully
initialized. Returns an error if not enough elements are available for reservation,
or there was previous reservation.
Defined at line 18 of file ../../src/storage/minfs/allocator/allocator_reservation.cc
zx::result<> ExtendReservation (PendingWork * transaction, size_t reserved)Extends reservation by |reserved| number of elements.
Returns an error if not enough elements are available for reservation.
Defined at line 29 of file ../../src/storage/minfs/allocator/allocator_reservation.cc
void AllocatorReservation (const AllocatorReservation & )Not copyable or movable.
Defined at line 37 of file ../../src/storage/minfs/allocator/allocator_reservation.h
size_t Allocate ()Allocate a new item in allocator_. Return the index of the newly allocated item.
Defined at line 37 of file ../../src/storage/minfs/allocator/allocator_reservation.cc
AllocatorReservation & operator= (const AllocatorReservation & )Defined at line 38 of file ../../src/storage/minfs/allocator/allocator_reservation.h
void Deallocate (size_t element)Deallocate a new item from allocate_.
Defined at line 43 of file ../../src/storage/minfs/allocator/allocator_reservation.cc
void Cancel ()Unreserve all currently reserved items.
Defined at line 55 of file ../../src/storage/minfs/allocator/allocator_reservation.cc
size_t Swap (size_t old_index)Swap the element currently allocated at |old_index| for a new index.
If |old_index| is 0, a new block will still be allocated, but no blocks will be de-allocated.
The swap will not be persisted until a call to Commit is made.
Defined at line 46 of file ../../src/storage/minfs/allocator/allocator_reservation.cc
PendingAllocations & GetPendingAllocations (Allocator * allocator)Returns the pending allocations. Only Allocator should manipulate it.
Defined at line 62 of file ../../src/storage/minfs/allocator/allocator_reservation.cc
PendingDeallocations & GetPendingDeallocations (Allocator * allocator)Returns the pending deallocations. Only Allocator should manipulate it.
Defined at line 69 of file ../../src/storage/minfs/allocator/allocator_reservation.cc
std::unique_ptr<PendingDeallocations> TakePendingDeallocations ()Defined at line 75 of file ../../src/storage/minfs/allocator/allocator_reservation.h
void Commit (PendingWork * transaction)Commit all pending changes, which means all bitmaps are updated (via the transaction). You most
likely don't need to call this because it is called in Minfs::CommitTransaction.
Defined at line 76 of file ../../src/storage/minfs/allocator/allocator_reservation.cc
size_t GetReserved ()Defined at line 83 of file ../../src/storage/minfs/allocator/allocator_reservation.h