Module request 

Request admission, deadline, and cooperative cancellation.

Admission rejects excess requests immediately instead of building an unbounded queue. Clones share one limit. Dropping a request cancels its later stages; an already-running blocking job retains its admission until it actually ends.

Public tile and warp calls default to a 30-second deadline. Configure defaults through TilerConfig / MosaicConfig, or pass RequestOptions to a *_with_options call. Cancelling its handle, timing out, or dropping that future cancels later stages. Synchronous kernels are cooperative at stage boundaries, so cancellation does not preempt a running codec or warp kernel. CPU, admission and working-byte permits remain held until that kernel ends. Returned images/bytes belong to the caller and are outside active-work limits.

Structs

RequestCancellation

Caller-controlled, one-shot cancellation handle shared by its clones.

RequestLimiter

Shared admission limit. Defaults share a process-wide pool of 64 requests.

RequestOptions

Per-call overrides. timeout: None uses the tiler configuration.

Constants

DEFAULT_MAX_IN_FLIGHT_REQUESTS

Capacity of the process-wide admission pool used by default tilers and mosaics.

DEFAULT_REQUEST_TIMEOUT

Default total tiler request deadline, including I/O and queued CPU work: 30 seconds.