threads

package
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Published: Apr 23, 2026 License: Apache-2.0 Imports: 9 Imported by: 0

Documentation

Overview

Package threads provides SRFI-18 multithreading primitives.

Threads

  • make-thread, thread?
  • thread-name, thread-specific, thread-specific-set!
  • thread-start!, thread-yield!, thread-sleep!
  • thread-terminate!, thread-join!
  • current-thread

Mutexes

  • make-mutex, mutex?
  • mutex-name, mutex-specific, mutex-specific-set!
  • mutex-state
  • mutex-lock!, mutex-unlock!

Condition Variables

  • make-condition-variable, condition-variable?
  • condition-variable-name
  • condition-variable-specific, condition-variable-specific-set!
  • condition-variable-signal!, condition-variable-broadcast!

Time

  • current-time, time?, time->seconds, seconds->time

Exceptions

  • join-timeout-exception?, abandoned-mutex-exception?
  • terminated-thread-exception?, uncaught-exception?
  • uncaught-exception-reason

Use Extension or AddToRegistry to register all primitives.

Package threads provides SRFI-18 threading primitives.

Index

Constants

This section is empty.

Variables

View Source
var AddToRegistry = Builder.AddToRegistry

AddToRegistry registers all threading primitives.

View Source
var Builder = registry.NewRegistryBuilder(addThreads, addMutexes, addConditionVariables, addTime)

Builder aggregates all threading registration functions.

View Source
var Extension = registry.NewDescribedExtension("threads",
	"Concurrency: SRFI-18 threads, mutexes, condition variables, channels.",
	AddToRegistry)

Extension is the threads extension.

View Source
var PrimConditionVariableQ = helpers.MakeTypePredicate(func(o values.Value) bool {
	_, ok := o.(*values.ConditionVariable)
	return ok
})

PrimConditionVariableQ tests if an object is a condition variable (condition-variable? obj) -> boolean

View Source
var PrimMutexQ = helpers.MakeTypePredicate(func(o values.Value) bool {
	_, ok := o.(*values.Mutex)
	return ok
})

PrimMutexQ tests if an object is a mutex (mutex? obj) -> boolean

View Source
var PrimThreadQ = helpers.MakeTypePredicate(func(o values.Value) bool {
	_, ok := o.(*values.Thread)
	return ok
})

PrimThreadQ tests if an object is a thread (thread? obj) -> boolean

View Source
var PrimTimeQ = helpers.MakeTypePredicate(func(o values.Value) bool {
	_, ok := o.(*values.Time)
	return ok
})

PrimTimeQ tests if an object is a time (time? obj) -> boolean

Functions

func PrimConditionVariableBroadcast

func PrimConditionVariableBroadcast(mc machine.CallContext) error

PrimConditionVariableBroadcast signals all waiting threads (condition-variable-broadcast! cv) -> void

func PrimConditionVariableName

func PrimConditionVariableName(mc machine.CallContext) error

PrimConditionVariableName returns the condition variable's name (condition-variable-name cv) -> string or symbol

func PrimConditionVariableSignal

func PrimConditionVariableSignal(mc machine.CallContext) error

PrimConditionVariableSignal signals one waiting thread (condition-variable-signal! cv) -> void

func PrimConditionVariableSpecific

func PrimConditionVariableSpecific(mc machine.CallContext) error

PrimConditionVariableSpecific returns the condition variable's specific field (condition-variable-specific cv) -> value

func PrimConditionVariableSpecificSet

func PrimConditionVariableSpecificSet(mc machine.CallContext) error

PrimConditionVariableSpecificSet sets the condition variable's specific field (condition-variable-specific-set! cv obj) -> void

func PrimCurrentThread

func PrimCurrentThread(mc machine.CallContext) error

PrimCurrentThread returns the current executing thread. Returns the thread object if running inside a thread, or the symbol 'primordial for the main goroutine. (current-thread) -> thread

func PrimCurrentTime

func PrimCurrentTime(mc machine.CallContext) error

PrimCurrentTime returns the current time (current-time) -> time

func PrimMakeConditionVariable

func PrimMakeConditionVariable(mc machine.CallContext) error

PrimMakeConditionVariable creates a new condition variable (make-condition-variable [name]) -> condition-variable

func PrimMakeMutex

func PrimMakeMutex(mc machine.CallContext) error

PrimMakeMutex creates a new mutex (make-mutex [name]) -> mutex

func PrimMakeThread

func PrimMakeThread(cc machine.CallContext) error

PrimMakeThread creates a new thread (make-thread thunk [name]) -> thread

func PrimMutexLock

func PrimMutexLock(mc machine.CallContext) error

PrimMutexLock acquires the mutex (mutex-lock! mutex [timeout [thread]]) -> boolean Returns #t if acquired, #f if timeout

func PrimMutexName

func PrimMutexName(mc machine.CallContext) error

PrimMutexName returns the mutex's name (mutex-name mutex) -> string or symbol

func PrimMutexSpecific

func PrimMutexSpecific(mc machine.CallContext) error

PrimMutexSpecific returns the mutex's specific field (mutex-specific mutex) -> value

func PrimMutexSpecificSet

func PrimMutexSpecificSet(mc machine.CallContext) error

PrimMutexSpecificSet sets the mutex's specific field (mutex-specific-set! mutex obj) -> void

func PrimMutexState

func PrimMutexState(mc machine.CallContext) error

PrimMutexState returns the mutex's state (mutex-state mutex) -> symbol or thread Returns: 'not-owned, 'abandoned, 'not-abandoned, or the owner thread

func PrimMutexUnlock

func PrimMutexUnlock(mc machine.CallContext) error

PrimMutexUnlock releases the mutex (mutex-unlock! mutex [condition-variable [timeout]]) -> boolean

func PrimSecondsToTime

func PrimSecondsToTime(mc machine.CallContext) error

PrimSecondsToTime converts seconds to a time (seconds->time x) -> time

func PrimThreadJoin

func PrimThreadJoin(mc machine.CallContext) error

PrimThreadJoin waits for a thread to terminate (thread-join! thread [timeout [timeout-val]]) -> value

func PrimThreadName

func PrimThreadName(mc machine.CallContext) error

PrimThreadName returns the thread's name (thread-name thread) -> string or symbol

func PrimThreadSleep

func PrimThreadSleep(mc machine.CallContext) error

PrimThreadSleep pauses execution for a time (thread-sleep! timeout) -> void timeout can be a time object or a number (seconds)

func PrimThreadSpecific

func PrimThreadSpecific(mc machine.CallContext) error

PrimThreadSpecific returns the thread's specific field (thread-specific thread) -> value

func PrimThreadSpecificSet

func PrimThreadSpecificSet(mc machine.CallContext) error

PrimThreadSpecificSet sets the thread's specific field (thread-specific-set! thread obj) -> void

func PrimThreadStart

func PrimThreadStart(mc machine.CallContext) error

PrimThreadStart starts a thread (thread-start! thread) -> thread

func PrimThreadTerminate

func PrimThreadTerminate(mc machine.CallContext) error

PrimThreadTerminate forcefully terminates a thread (thread-terminate! thread) -> void

func PrimThreadYield

func PrimThreadYield(mc machine.CallContext) error

PrimThreadYield yields execution to other threads (thread-yield!) -> void

func PrimTimeToSeconds

func PrimTimeToSeconds(mc machine.CallContext) error

PrimTimeToSeconds converts a time to seconds (time->seconds time) -> number

Types

This section is empty.

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