stk::Thread Class Reference

STK thread class. More...

#include <Thread.h>

Inheritance diagram for stk::Thread:

Public Member Functions
	Thread ()
	Default constructor.
	~Thread ()
	The class destructor does not attempt to cancel or join a thread.
bool	start (THREAD_FUNCTION routine, void *ptr=NULL)
	Begin execution of the thread routine. Upon success, true is returned. More...
bool	cancel (void)
	Signal cancellation of a thread routine, returning true on success. More...
bool	wait (void)
	Block the calling routine indefinitely until the thread terminates. More...
void	testCancel (void)
	Create a cancellation point within a thread routine. More...
void	ignoreSampleRateChange (bool ignore=true)
	A function to enable/disable the automatic updating of class data when the STK sample rate changes. More...

Static Public Member Functions
static StkFloat	sampleRate (void)
	Static method that returns the current STK sample rate.
static void	setSampleRate (StkFloat rate)
	Static method that sets the STK sample rate. More...
static void	clear_alertList ()
	Static method that frees memory from alertList_.
static std::string	rawwavePath (void)
	Static method that returns the current rawwave path.
static void	setRawwavePath (std::string path)
	Static method that sets the STK rawwave path.
static void	swap16 (unsigned char *ptr)
	Static method that byte-swaps a 16-bit data type.
static void	swap32 (unsigned char *ptr)
	Static method that byte-swaps a 32-bit data type.
static void	swap64 (unsigned char *ptr)
	Static method that byte-swaps a 64-bit data type.
static void	sleep (unsigned long milliseconds)
	Static cross-platform method to sleep for a number of milliseconds.
static bool	inRange (StkFloat value, StkFloat min, StkFloat max)
	Static method to check whether a value is within a specified range.
static void	handleError (const char *message, StkError::Type type)
	Static function for error reporting and handling using c-strings.
static void	handleError (std::string message, StkError::Type type)
	Static function for error reporting and handling using c++ strings.
static void	showWarnings (bool status)
	Toggle display of WARNING and STATUS messages.
static void	printErrors (bool status)
	Toggle display of error messages before throwing exceptions.

Static Public Attributes
static const StkFormat	STK_SINT8
static const StkFormat	STK_SINT16
static const StkFormat	STK_SINT24
static const StkFormat	STK_SINT32
static const StkFormat	STK_FLOAT32
static const StkFormat	STK_FLOAT64

Protected Member Functions
void	handleError (StkError::Type type) const
	Internal function for error reporting that assumes message in oStream_ variable.
virtual void	sampleRateChanged (StkFloat newRate, StkFloat oldRate)
	This function should be implemented in subclasses that depend on the sample rate.
void	addSampleRateAlert (Stk *ptr)
	Add class pointer to list for sample rate change notification.
void	removeSampleRateAlert (Stk *ptr)
	Remove class pointer from list for sample rate change notification.

Detailed Description

STK thread class.

This class provides a uniform interface for cross-platform threads. On unix systems, the pthread library is used. Under Windows, the C runtime threadex functions are used.

Each instance of the Thread class can be used to control a single thread process. Routines are provided to signal cancelation and/or joining with a thread, though it is not possible for this class to know the running status of a thread once it is started.

For cross-platform compatability, thread functions should be declared as follows:

THREAD_RETURN THREAD_TYPE thread_function(void *ptr)

by Perry R. Cook and Gary P. Scavone, 1995–2019.

Member Function Documentation

start()

bool stk::Thread::start	(	THREAD_FUNCTION	routine,
		void *	ptr = NULL
	)

Begin execution of the thread routine. Upon success, true is returned.

A data pointer can be supplied to the thread routine via the optional ptr argument. If the thread cannot be created, the return value is false.

cancel()

bool stk::Thread::cancel

(

void

)

Signal cancellation of a thread routine, returning true on success.

This function only signals thread cancellation. It does not wait to verify actual routine termination. A true return value only signifies that the cancellation signal was properly executed, not thread cancellation. A thread routine may need to make use of the testCancel() function to specify a cancellation point.

wait()

bool stk::Thread::wait

(

void

)

Block the calling routine indefinitely until the thread terminates.

This function suspends execution of the calling routine until the thread has terminated. It will return immediately if the thread was already terminated. A true return value signifies successful termination. A false return value indicates a problem with the wait call.

testCancel()

void stk::Thread::testCancel

(

void

)

Create a cancellation point within a thread routine.

This function call checks for thread cancellation, allowing the thread to be terminated if a cancellation request was previously signaled.

setSampleRate()

static void stk::Stk::setSampleRate ( StkFloat  rate )

staticinherited

Static method that sets the STK sample rate.

The sample rate set using this method is queried by all STK classes that depend on its value. It is initialized to the default SRATE set in Stk.h. Many STK classes use the sample rate during instantiation. Therefore, if you wish to use a rate that is different from the default rate, it is imperative that it be set BEFORE STK objects are instantiated. A few classes that make use of the global STK sample rate are automatically notified when the rate changes so that internal class data can be appropriately updated. However, this has not been fully implemented. Specifically, classes that appropriately update their own data when either a setFrequency() or noteOn() function is called do not currently receive the automatic notification of rate change. If the user wants a specific class instance to ignore such notifications, perhaps in a multi-rate context, the function Stk::ignoreSampleRateChange() should be called.

ignoreSampleRateChange()

void stk::Stk::ignoreSampleRateChange ( bool  ignore = true )

inlineinherited

A function to enable/disable the automatic updating of class data when the STK sample rate changes.

This function allows the user to enable or disable class data updates in response to global sample rate changes on a class by class basis.

{ ignoreSampleRateChange_ = ignore; };

Member Data Documentation

STK_SINT8

const StkFormat stk::Stk::STK_SINT8

staticinherited

-128 to +127

STK_SINT16

const StkFormat stk::Stk::STK_SINT16

staticinherited

-32768 to +32767

STK_SINT24

const StkFormat stk::Stk::STK_SINT24

staticinherited

Lower 3 bytes of 32-bit signed integer.

STK_SINT32

const StkFormat stk::Stk::STK_SINT32

staticinherited

-2147483648 to +2147483647.

STK_FLOAT32

const StkFormat stk::Stk::STK_FLOAT32

staticinherited

Normalized between plus/minus 1.0.

STK_FLOAT64

const StkFormat stk::Stk::STK_FLOAT64

staticinherited

Normalized between plus/minus 1.0.

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The documentation for this class was generated from the following file:

• Thread.h