internal/pipewire: implement Core::RemoveId

This is emitted by the server when a proxy id is removed for any reason. Currently, the only path for this to be emitted is when a global object is destroyed while some proxy is still bound to it.

Signed-off-by: Ophestra <cat@gensokyo.uk>

internal/pipewire/securitycontext.go

@@ -26,9 +26,10 @@ const (
 
 const (
 	PW_SECURITY_CONTEXT_METHOD_ADD_LISTENER = iota
-	PW_SECURITY_CONTEXT_METHOD_CREATE
-	PW_SECURITY_CONTEXT_METHOD_NUM
 
+	PW_SECURITY_CONTEXT_METHOD_CREATE
+
+	PW_SECURITY_CONTEXT_METHOD_NUM
 	PW_VERSION_SECURITY_CONTEXT_METHODS = 0
 )
 
@@ -90,6 +91,8 @@ type SecurityContext struct {
 	GlobalID Int `json:"id"`
 
 	ctx *Context
+
+	removable
 }
 
 // GetSecurityContext queues a [RegistryBind] message for the PipeWire server
@@ -109,6 +112,10 @@ func (registry *Registry) GetSecurityContext() (securityContext *SecurityContext
 
 // Create queues a [SecurityContextCreate] message for the PipeWire server.
 func (securityContext *SecurityContext) Create(listenFd, closeFd int, props SPADict) error {
+	if err := securityContext.checkDestroy(); err != nil {
+		return err
+	}
+
 	// queued in reverse based on upstream behaviour, unsure why
 	offset := securityContext.ctx.queueFiles(closeFd, listenFd)
 	return securityContext.ctx.writeMessage(
@@ -144,6 +151,9 @@ func (scc *securityContextCloser) Close() (err error) {
 // BindAndCreate binds a new socket to the specified pathname and pass it to Create.
 // It returns an [io.Closer] corresponding to [SecurityContextCreate.CloseFd].
 func (securityContext *SecurityContext) BindAndCreate(pathname string, props SPADict) (io.Closer, error) {
+	if err := securityContext.checkDestroy(); err != nil {
+		return nil, err
+	}
 	var scc securityContextCloser
 
 	// ensure pathname is available
@@ -185,6 +195,7 @@ func (securityContext *SecurityContext) BindAndCreate(pathname string, props SPA
 }
 
 func (securityContext *SecurityContext) consume(opcode byte, files []int, _ func(v any)) error {
+	securityContext.mustCheckDestroy()
 	closeReceivedFiles(files...)
 	switch opcode {
 	// SecurityContext does not receive any events
@@ -196,6 +207,7 @@ func (securityContext *SecurityContext) consume(opcode byte, files []int, _ func
 }
 
 func (securityContext *SecurityContext) setBoundProps(event *CoreBoundProps) error {
+	securityContext.mustCheckDestroy()
 	if securityContext.ID != event.ID {
 		return &InconsistentIdError{Proxy: securityContext, ID: securityContext.ID, ServerID: event.ID}
 	}