package octez-internal-libs
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Dune Dependency
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sha256=ddfb5076eeb0b32ac21c1eed44e8fc86a6743ef18ab23fff02d36e365bb73d61
sha512=d22a827df5146e0aa274df48bc2150b098177ff7e5eab52c6109e867eb0a1f0ec63e6bfbb0e3645a6c2112de3877c91a17df32ccbff301891ce4ba630c997a65
doc/irmin_pack_unix/Irmin_pack_unix/Sparse_file/Make/Wo/index.html
Module Make.WoSource
val open_wo :
mapping_size:int ->
mapping:string ->
data:string ->
(t, [> open_error ]) Stdlib.resultopen_wo ~mapping_size ~mapping ~data returns a write-only instance of the sparse file.
Note: This is unsafe and is only used by the GC to mark the parent commits as dangling. One must ensure that no read-only instance is opened at the same time, as otherwise the writes would be observable by it.
write_exn t ~off ~len str writes the first len bytes of str to t at the virtual offset off.
fsync t persists to the file system the effects of previous writes.
Close the underlying files.
val create_from_data :
mapping:string ->
dead_header_size:int ->
size:Optint.Int63.t ->
data:string ->
(Optint.Int63.t, [> Io.create_error | Io.write_error | Io.close_error ])
Stdlib.resultcreate_from_data ~mapping ~dead_header_size ~size ~data initializes a new sparse file on disk from the existing file data, by creating the corresponding mapping file. The first dead_header_size bytes are ignored and the remaining size bytes of data are made available.
On success, returns the size of the mapping file to be stored in the control file for consistency checking on open.