mirror of
https://github.com/samuelncui/acp.git
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Samuel Cui
ac02c71d3f
Reshape the public API around one push engine and restore theaf05f05csurface as a compatibility shell over it. - NewStream takes caller-owned items (Source/Targets), reports every accepted item through one results callback, and Wait returns the run's terminal error. Run, BatchSource and the item callbacks are gone. - The engine owns the result path: WithResultBuffer is the depth of the result queue, WithResultBatch is how many results one delivery carries, and WithResultFlushInterval is how long a successful result may wait. A result that carries any error is delivered immediately as its own batch. - Restore theaf05f05cAPI byte-compatibly in the same package: New, Copyer, Wait/WaitErr, AccurateJob, WildcardJob, the report events and the JSON report round-trip through encoding/json alone. - One descriptor serves a whole item; the stored hash is read through the descriptor that reads the content and the computed hash is published through it before it closes. - Make every handoff escapable by a hard stop: the read buffer, a chunk send, an event send and the result buffer. - Fix the recorded sweep findings: report indent and round-trip, cmd/acp exit status, acp-rewrite final paths, mmap EOF/close/slice, disk-usage reservations, ErrTargetIO identity, the fatal-panic safety net, option validation, and the FreeBSD/Windows build paths. - Cover the contract with semantic tests, add Makefile check/race/vet/cross targets, and document the withdrawn v0.1.0/v0.2.0 migration in README.
71 lines
1.4 KiB
Go
71 lines
1.4 KiB
Go
package acp
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import "fmt"
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// ReadMode selects how a source device reads its content.
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type ReadMode uint8
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const (
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// ReadBuffered reads through the kernel's buffered path, which is the default.
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ReadBuffered ReadMode = iota
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// ReadMapped reads through a memory mapping.
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ReadMapped
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)
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func (m ReadMode) String() string {
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switch m {
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case ReadBuffered:
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return "buffered"
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case ReadMapped:
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return "mapped"
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}
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return fmt.Sprintf("unknown(%d)", uint8(m))
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}
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type deviceOption struct {
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linear bool
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threads int
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readMode ReadMode
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}
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func (do *deviceOption) check() error {
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if do.threads < 0 {
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return fmt.Errorf("device threads cannot be negative, threads=%d", do.threads)
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}
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if do.threads == 0 {
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do.threads = 8
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}
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if do.linear {
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do.threads = 1
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}
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if do.readMode != ReadBuffered && do.readMode != ReadMapped {
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return fmt.Errorf("unknown read mode, mode= %s", do.readMode)
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}
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return nil
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}
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type DeviceOption func(*deviceOption) *deviceOption
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func LinearDevice(b bool) DeviceOption {
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return func(d *deviceOption) *deviceOption {
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d.linear = b
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return d
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}
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}
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func DeviceThreads(threads int) DeviceOption {
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return func(d *deviceOption) *deviceOption {
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d.threads = threads
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return d
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}
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}
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// WithReadMode selects how a source device reads its content. It applies to the source
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// device only and defaults to buffered reads.
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func WithReadMode(mode ReadMode) DeviceOption {
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return func(d *deviceOption) *deviceOption {
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d.readMode = mode
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return d
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}
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}
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