mutex.c File Reference

(7c4d7d1 userspace/term: change eyecandy inclusion to use objcopy instead of xxd)

#include <tpa.h>
#include <vm.h>
#include <panic.h>
#include <mutex.h>
#include <log.h>
#include <scheduler.h>
#include <errno.h>

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Data Structures
struct	mutex_data

Functions
void	init_mutex (void)
mutex_t	mutex_create (void)
void	mutex_destroy (mutex_t mutex)
bool	mutex_lock (mutex_t mutex, pid_t holder)
bool	mutex_unlock (mutex_t mutex, pid_t holder)
void	mutex_unlock_holder (pid_t pid)
void	sc_handle_locking_create_mutex (uint64_t *mutex, uint64_t *error)
void	sc_handle_locking_destroy_mutex (uint64_t mutex, uint64_t *error)
void	sc_handle_locking_lock_mutex (uint64_t mutex, bool trylock, uint64_t *error)
void	sc_handle_locking_unlock_mutex (uint64_t mutex, uint64_t *error)

Variables
static tpa_t *	mutexes
static uint64_t	next_mutex = 1

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Data Structure Documentation

mutex_data

struct mutex_data

Definition at line 12 of file mutex.c.

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Data Fields
pid_t	holder	PID of the process who holds the current lock.
int	state	Current state of this mutex, 0 = unlocked.

Function Documentation

init_mutex()

void init_mutex

(

void

)

Definition at line 20 of file mutex.c.

References kernel_alloc, mutexes, and tpa_new().

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mutex_create()

mutex_t mutex_create

(

void

)

Definition at line 24 of file mutex.c.

References mutexes, next_mutex, panic_message(), mutex_data::state, and tpa_set().

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mutex_destroy()

void mutex_destroy

(

mutex_t

mutex

)

Definition at line 38 of file mutex.c.

References logw, mutex, mutexes, panic_message(), mutex_data::state, tpa_get(), and tpa_set().

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mutex_lock()

bool mutex_lock	(	mutex_t	mutex,
		pid_t	holder
	)

Definition at line 52 of file mutex.c.

References mutex_data::holder, mutex, mutexes, panic_message(), mutex_data::state, and tpa_get().

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mutex_unlock()

bool mutex_unlock	(	mutex_t	mutex,
		pid_t	holder
	)

Definition at line 68 of file mutex.c.

References mutex_data::holder, logw, mutex, wait_data::mutex, mutexes, panic_message(), scheduler_waitable_done(), mutex_data::state, tpa_get(), and wait_reason_mutex.

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mutex_unlock_holder()

void mutex_unlock_holder

(

pid_t

pid

)

Definition at line 95 of file mutex.c.

References mutex_data::holder, logd, logw, mutex, mutex_unlock(), mutexes, pid, mutex_data::state, tpa_get(), and tpa_next().

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sc_handle_locking_create_mutex()

void sc_handle_locking_create_mutex	(	uint64_t *	mutex,
		uint64_t *	error
	)

Definition at line 117 of file mutex.c.

References ENOMEM, error, logw, mutex, mutex_create(), and next_mutex.

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sc_handle_locking_destroy_mutex()

void sc_handle_locking_destroy_mutex	(	uint64_t	mutex,
		uint64_t *	error
	)

Definition at line 128 of file mutex.c.

References EBUSY, EINVAL, error, mutex, mutex_destroy(), mutexes, mutex_data::state, and tpa_get().

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sc_handle_locking_lock_mutex()

void sc_handle_locking_lock_mutex	(	uint64_t	mutex,
		bool	trylock,
		uint64_t *	error
	)

Definition at line 144 of file mutex.c.

References EBUSY, EINVAL, error, mutex_data::holder, logw, mutex, wait_data::mutex, mutex_lock(), mutexes, scheduler_current_process, scheduler_wait_for(), mutex_data::state, tpa_get(), trylock, and wait_reason_mutex.

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sc_handle_locking_unlock_mutex()

void sc_handle_locking_unlock_mutex	(	uint64_t	mutex,
		uint64_t *	error
	)

Definition at line 184 of file mutex.c.

References EINVAL, EPERM, error, mutex_data::holder, mutex, mutex_unlock(), mutexes, scheduler_current_process, mutex_data::state, and tpa_get().

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Variable Documentation

mutexes

tpa_t* mutexes

static

Definition at line 9 of file mutex.c.

next_mutex

uint64_t next_mutex = 1

static

Definition at line 10 of file mutex.c.