scheduler.h File Reference

(29312b1 fbconsole, panic: render panic after framebuffer was given to userspace - without clearing screen contents)

#include <stdint.h>
#include <vm.h>
#include <cpu.h>
#include <mutex.h>
#include <condvar.h>

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Data Structures
union	wait_data

Enumerations
enum	kill_reason { kill_reason_segv = 1 , kill_reason_abort = 2 }
enum	wait_reason { wait_reason_mutex , wait_reason_condvar , wait_reason_message , wait_reason_time }

Functions
void	init_scheduler (void)
void	start_task (struct vm_table *context, ptr_t entry, ptr_t data_start, ptr_t data_end, const char *name)
void	schedule_next (cpu_state **cpu, struct vm_table **context)
bool	schedule_next_if_needed (cpu_state **cpu, struct vm_table **context)
void	scheduler_process_save (cpu_state *cpu)
bool	scheduler_handle_pf (ptr_t fault_address, uint64_t error_code)
void	scheduler_kill_current (enum kill_reason kill_reason)
void	scheduler_wait_for (pid_t pid, enum wait_reason reason, union wait_data data)
void	scheduler_waitable_done (enum wait_reason reason, union wait_data data, size_t max_amount)
ptr_t	scheduler_map_hardware (ptr_t hw, size_t len)
	Map a given memory area in the currently running userspace process at a random location.

Variables
volatile pid_t	scheduler_current_process

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Data Structure Documentation

wait_data

union wait_data

Definition at line 25 of file scheduler.h.

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Data Fields
condvar_t	condvar
uint64_t	message_queue
mutex_t	mutex
uint64_t	timestamp_ns_since_boot

Enumeration Type Documentation

kill_reason

enum kill_reason

Enumerator
kill_reason_segv
kill_reason_abort

Definition at line 8 of file scheduler.h.

wait_reason

enum wait_reason

Enumerator
wait_reason_mutex
wait_reason_condvar
wait_reason_message
wait_reason_time

Definition at line 13 of file scheduler.h.

Function Documentation

init_scheduler()

void init_scheduler

(

void

)

Definition at line 87 of file scheduler.c.

References MAX_PROCS, memset(), and processes.

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schedule_next()

void schedule_next	(	cpu_state **	cpu,
		struct vm_table **	context
	)

Definition at line 181 of file scheduler.c.

References process_t::context, process_t::cpu, MAX_PROCS, pid, process, process_state_runnable, process_state_running, process_state_waiting, processes, sc_handle_clock_read(), scheduler_current_process, scheduler_idle_if_needed(), process_t::state, state, and wait_reason_time.

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schedule_next_if_needed()

bool schedule_next_if_needed	(	cpu_state **	cpu,
		struct vm_table **	context
	)

Definition at line 221 of file scheduler.c.

References process_state_runnable, process_state_running, processes, schedule_next(), scheduler_current_process, and state.

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scheduler_handle_pf()

bool scheduler_handle_pf	(	ptr_t	fault_address,
		uint64_t	error_code
	)

Definition at line 334 of file scheduler.c.

References ALLOCATOR_REGION_DIRECT_MAPPING, ALLOCATOR_REGION_USER_STACK, logw, memset(), mm_alloc_pages(), name, processes, scheduler_current_process, process_t::stack, region_t::start, and vm_context_map().

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scheduler_kill_current()

void scheduler_kill_current

(

enum kill_reason

kill_reason

)

scheduler_map_hardware()

ptr_t scheduler_map_hardware	(	ptr_t	hw,
		size_t	len
	)

Map a given memory area in the currently running userspace process at a random location.

Definition at line 605 of file scheduler.c.

References region_t::end, process_t::hw, processes, scheduler_current_process, and vm_map_hardware().

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scheduler_process_save()

void scheduler_process_save

(

cpu_state *

cpu

)

Definition at line 155 of file scheduler.c.

References memcpy(), process_state_running, process_state_waiting, processes, scheduler_current_process, and state.

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scheduler_wait_for()

void scheduler_wait_for	(	pid_t	pid,
		enum wait_reason	reason,
		union wait_data	data
	)

Definition at line 353 of file scheduler.c.

References pid, process_state_waiting, processes, scheduler_current_process, process_t::state, process_t::waiting_data, and process_t::waiting_for.

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scheduler_waitable_done()

void scheduler_waitable_done	(	enum wait_reason	reason,
		union wait_data	data,
		size_t	max_amount
	)

Definition at line 363 of file scheduler.c.

References wait_data::condvar, MAX_PROCS, wait_data::message_queue, wait_data::mutex, mutex_lock(), pid, process_state_runnable, process_state_waiting, processes, scheduler_current_process, process_t::state, wait_reason_condvar, wait_reason_message, wait_reason_mutex, wait_reason_time, process_t::waiting_data, and process_t::waiting_for.

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start_task()

void start_task	(	struct vm_table *	context,
		ptr_t	entry,
		ptr_t	data_start,
		ptr_t	data_end,
		const char *	name
	)

Definition at line 136 of file scheduler.c.

References ALLOCATOR_REGION_USER_STACK, data_end, entry, name, panic_message(), process_t::parent, pid, process, processes, setup_process(), and strncpy().

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Variable Documentation

scheduler_current_process

volatile pid_t scheduler_current_process

extern

Definition at line 50 of file scheduler.c.