thread.c File Reference

Include dependency graph for thread.c:

Data Structures
struct	vlc_thread
struct	vlc_threadvar

Macros
#define	_DECL_DLLMAIN
#define	NTDDI_WIN10_RS1   0x0A000002
#define	LOOKUP(s)

Typedefs
typedef HRESULT(WINAPI *	SetThreadDescription_ptr) (HANDLE, PCWSTR)

Functions
int	vlc_threadvar_create (vlc_threadvar_t *p_tls, void(*destr)(void *))
	Allocates a thread-specific variable.
void	vlc_threadvar_delete (vlc_threadvar_t *p_tls)
	Deallocates a thread-specific variable.
int	vlc_threadvar_set (vlc_threadvar_t key, void *value)
	Sets a thread-specific variable.
void *	vlc_threadvar_get (vlc_threadvar_t key)
	Gets the value of a thread-local variable for the calling thread.
static void	vlc_threadvars_cleanup (void)
void	vlc_atomic_wait (void *addr, unsigned val)
	Waits on an address.
int	vlc_atomic_timedwait (void *addr, unsigned val, vlc_tick_t deadline)
	Waits on an address with a time-out.
void	vlc_atomic_notify_one (void *addr)
	Wakes up one thread on an address.
void	vlc_atomic_notify_all (void *addr)
	Wakes up all thread on an address.
static unsigned __stdcall	ThreadEntry (void *p)
int	vlc_clone (vlc_thread_t *p_handle, void *(*entry)(void *), void *data)
	Creates and starts a new thread.
void	vlc_join (vlc_thread_t th, void **result)
	Waits for a thread to complete (if needed), then destroys it.
unsigned long	vlc_thread_id (void)
	Thread identifier.
void	vlc_thread_set_name (const char *name)
	Set the thread name of the current thread.
static void CALLBACK	vlc_cancel_self (ULONG_PTR self)
void	vlc_cancel (vlc_thread_t th)
	Marks a thread as cancelled.
int	vlc_savecancel (void)
	Disables thread cancellation.
void	vlc_restorecancel (int state)
	Restores the cancellation state.
static _Noreturn void	vlc_docancel (struct vlc_thread *th)
void	vlc_testcancel (void)
	Issues an explicit deferred cancellation point.
void	vlc_control_cancel (vlc_cleanup_t *cleaner)
	Internal handler for thread cancellation.
static vlc_tick_t	mdate_perf (void)
static vlc_tick_t	mdate_perf_100ns (void)
static vlc_tick_t	mdate_wall (void)
vlc_tick_t	vlc_tick_now (void)
	Precision monotonic clock.
void	vlc_tick_wait (vlc_tick_t deadline)
	Waits until a deadline.
void	vlc_tick_sleep (vlc_tick_t delay)
	Waits for an interval of time.
static void	SelectClockSource (libvlc_int_t *obj)
unsigned	vlc_GetCPUCount (void)
	Count CPUs.
void	vlc_threads_setup (libvlc_int_t *vlc)
int __stdcall	DllMain (void *hinstDll, unsigned long fdwReason, void *lpvReserved)

Variables
static SRWLOCK	super_lock = SRWLOCK_INIT
static struct vlc_thread *	current_thread_ctx = NULL
struct vlc_threadvar *	vlc_threadvar_last = NULL
static SetThreadDescription_ptr	SetThreadDescription_
union {
struct {
LARGE_INTEGER   freq
}   perf
}	clk
static vlc_tick_t(*	mdate_selected )(void) = mdate_wall

Macro Definition Documentation

_DECL_DLLMAIN

#define _DECL_DLLMAIN

LOOKUP

#define LOOKUP

(

s

)

Value:

(((s##_) = (s##_ptr)GetProcAddress(h, #s)) != NULL)

Referenced by DllMain().

NTDDI_WIN10_RS1

#define NTDDI_WIN10_RS1   0x0A000002

Typedef Documentation

SetThreadDescription_ptr

typedef HRESULT(WINAPI * SetThreadDescription_ptr) (HANDLE, PCWSTR)

Function Documentation

DllMain()

int __stdcall DllMain	(	void *	hinstDll,
		unsigned long	fdwReason,
		void *	lpvReserved )

References LOOKUP, SetThreadDescription_, and vlc_threadvars_cleanup().

mdate_perf()

vlc_tick_t mdate_perf ( void )

static

References clk, unlikely, and vlc_tick_from_frac().

Referenced by SelectClockSource().

mdate_perf_100ns()

vlc_tick_t mdate_perf_100ns ( void )

static

References unlikely, and VLC_TICK_FROM_MSFTIME.

Referenced by SelectClockSource().

mdate_wall()

vlc_tick_t mdate_wall ( void )

static

References CLOCK_FREQ, and VLC_TICK_FROM_MSFTIME.

SelectClockSource()

void SelectClockSource ( libvlc_int_t * obj )

static

References clk, mdate_perf(), mdate_perf_100ns(), mdate_selected, msg_Dbg, msg_Err, name, and var_InheritString().

Referenced by vlc_threads_setup().

ThreadEntry()

unsigned __stdcall ThreadEntry ( void * p )

static

References current_thread_ctx, vlc_thread::data, vlc_thread::entry, vlc_thread::killable, p, and VLC_THREAD_CANCELED.

Referenced by vlc_clone().

vlc_atomic_notify_all()

void vlc_atomic_notify_all

(

void *

addr

)

Wakes up all thread on an address.

Wakes up all threads sleeping on the specified address (if any). Any thread sleeping within a call to vlc_atomic_wait() or vlc_atomic_timedwait() with the specified address as first call parameter will be woken up.

Parameters

addr	address identifying which threads to wake up

vlc_atomic_notify_one()

void vlc_atomic_notify_one

(

void *

addr

)

Wakes up one thread on an address.

Wakes up (at least) one of the thread sleeping on the specified address. The address must be equal to the first parameter given by at least one thread sleeping within the vlc_atomic_wait() or vlc_atomic_timedwait() functions. If no threads are found, this function does nothing.

Parameters

addr	address identifying which threads may be woken up

vlc_atomic_timedwait()

int vlc_atomic_timedwait	(	void *	addr,
		unsigned	val,
		vlc_tick_t	deadline )

Waits on an address with a time-out.

This function operates as vlc_atomic_wait() but provides an additional time-out. If the deadline is reached, the thread resumes and the function returns.

Parameters

addr	address to check for
val	value to match at the address
deadline	deadline to wait until

Return values

0	the function was woken up before the time-out
ETIMEDOUT	the deadline was reached

References MS_FROM_VLC_TICK, unlikely, and vlc_tick_now().

vlc_atomic_wait()

void vlc_atomic_wait	(	void *	addr,
		unsigned	val )

Waits on an address.

Puts the calling thread to sleep if a specific unsigned 32-bits value is stored at a specified address. The thread will sleep until it is woken up by a call to vlc_atomic_notify_one() or vlc_atomic_notify_all() in another thread, or spuriously.

If the value does not match, do nothing and return immediately.

Parameters

addr	address to check for
val	value to match at the address

vlc_cancel_self()

void CALLBACK vlc_cancel_self ( ULONG_PTR self )

static

vlc_docancel()

_Noreturn void vlc_docancel ( struct vlc_thread * th )

static

References vlc_thread::cleaners, vlc_thread::data, vlc_thread::killable, p, and VLC_THREAD_CANCELED.

Referenced by vlc_testcancel(), and vlc_tick_wait().

vlc_threads_setup()

void vlc_threads_setup

(

libvlc_int_t *

vlc

)

References msg_Dbg, SelectClockSource(), and var_InheritBool().

vlc_threadvars_cleanup()

void vlc_threadvars_cleanup ( void )

static

References vlc_threadvar::destroy, vlc_threadvar::id, vlc_threadvar::prev, super_lock, and vlc_threadvar_last.

Referenced by DllMain().

Variable Documentation

[union]

union { ... } clk

Referenced by mdate_perf(), and SelectClockSource().

current_thread_ctx

struct vlc_thread* current_thread_ctx = NULL

static

freq

LARGE_INTEGER freq

Referenced by rtp_queue(), and vlc_tick_now().

mdate_selected

vlc_tick_t(* mdate_selected) (void) ( void ) = mdate_wall

static

Referenced by SelectClockSource(), and vlc_tick_now().

[struct]

struct { ... } perf

SetThreadDescription_

SetThreadDescription_ptr SetThreadDescription_

static

Referenced by DllMain(), and vlc_thread_set_name().

super_lock

SRWLOCK super_lock = SRWLOCK_INIT

static

Referenced by vlc_threadvar_create(), vlc_threadvar_delete(), and vlc_threadvars_cleanup().

vlc_threadvar_last

struct vlc_threadvar * vlc_threadvar_last = NULL