contract

type Acquisition struct {
	ResourceID     string
	Priority       int64
	PriorityInputs map[string]string
	// GrantedUnixNS is when the unit was granted; 0 when it never was.
	GrantedUnixNS int64
	Outcome       string
}

type Link struct {
	TraceID string
	SpanID  string
	Attrs   map[string]any
}

type Op struct {
	Kind     string
	WorkType string
	Label    string
	Producer string
	// CausalParent is the span ID of the op's cause: wcprof.parent when set,
	// else the span's parent.
	CausalParent string
	StartUnixNS  int64
	EndUnixNS    int64
}

type ProducerComplete struct {
	Producer  string
	SpanCount int64
	Dropped   int64
}

type Reported struct {
	// Op is the reported op; nil for a span that isn't one (an engine span,
	// or a producer's completeness carrier).
	Op *Op
	// Waits are the span's wait links.
	Waits []Wait
	// Resource is set when Op.Kind is "resource".
	Resource *Resource
	// Acquisition is set when Op.Kind is "acquire".
	Acquisition *Acquisition
	// Complete is set on a producer's completeness carrier.
	Complete *ProducerComplete
}

type Resource struct {
	Name     string
	Capacity int64
	Policy   string
}

type Span struct {
	TraceID      string
	SpanID       string
	ParentSpanID string
	StartUnixNS  int64
	EndUnixNS    int64
	Attrs        map[string]any
	Links        []Link
}

type Wait struct {
	TargetTraceID string
	TargetSpanID  string
	Reason        string
	Ident         string
	StartUnixNS   int64
	EndUnixNS     int64
}