Open an Existing Buffer — buffer_open • shard

Opens a shared memory buffer that was created in another process. Used by workers to attach to the parent's output buffer.

Usage

buffer_open(path, type, dim, backing = c("mmap", "shm"), readonly = FALSE)

Arguments

path: Path or shm name of the buffer's segment.
type: Character. Data type of the buffer.
dim: Integer vector. Dimensions of the buffer.
backing: Backing type: "mmap" or "shm".
readonly: Logical. Open as read-only? Default FALSE for workers.

Value

A shard_buffer object attached to the existing segment.

Examples

# \donttest{
buf <- buffer("double", dim = 10)
path <- buffer_path(buf)
buf2 <- buffer_open(path, type = "double", dim = 10, backing = "mmap")
#> Error in segment_open(path, backing = backing, readonly = readonly): Failed to open shared memory segment
buffer_close(buf2, unlink = FALSE)
#> Error: object 'buf2' not found
buffer_close(buf)
# }