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{$IFDEF OGC_INTERFACE}
const
LWP_MUTEX_LOCKED = 0;
LWP_MUTEX_UNLOCKED = 1;
LWP_MUTEX_NEST_ACQUIRE = 0;
LWP_MUTEX_NEST_ERROR = 1;
LWP_MUTEX_NEST_BLOCK = 2;
LWP_MUTEX_FIFO = 0;
LWP_MUTEX_PRIORITY = 1;
LWP_MUTEX_INHERITPRIO = 2;
LWP_MUTEX_PRIORITYCEIL = 3;
LWP_MUTEX_SUCCESSFUL = 0;
LWP_MUTEX_UNSATISFIED_NOWAIT = 1;
LWP_MUTEX_NEST_NOTALLOWED = 2;
LWP_MUTEX_NOTOWNER = 3;
LWP_MUTEX_DELETED = 4;
LWP_MUTEX_TIMEOUT = 5;
LWP_MUTEX_CEILINGVIOL = 6;
type
_lwpmutexattr = record
mode : cuint32;
nest_behavior : cuint32;
prioceil : cuint8;
onlyownerrelease : cuint8;
end;
lwp_mutex_attr = _lwpmutexattr;
Plwp_mutex_attr = ^lwp_mutex_attr;
_lwpmutex = record
wait_queue : lwp_thrqueue;
atrrs : lwp_mutex_attr;
lock : cuint32;
nest_cnt : cuint32;
blocked_cnt : cuint32;
holder : Plwp_cntrl;
end;
lwp_mutex = _lwpmutex;
Plwp_mutex = ^lwp_mutex;
procedure __lwp_mutex_initialize(mutex: Plwp_mutex; attrs: Plwp_mutex_attr;
init_lock: cuint32); cdecl; external;
function __lwp_mutex_surrender(mutex: Plwp_mutex): cuint32; cdecl; external;
procedure __lwp_mutex_seize_irq_blocking(mutex: Plwp_mutex; timeout: cuint64); cdecl; external;
procedure __lwp_mutex_flush(mutex: Plwp_mutex; status: cuint32); cdecl; external;
function __lwp_mutex_seize_irq_trylock(mutex: plwp_mutex; isr_level: pcuint32): cuint32; inline;
procedure __lwp_mutex_seize(_mutex_t: plwp_mutex; _id: cuint32; _wait: cuint8; _timeout, _level: cuint32); inline;
{$ENDIF}
{$IFDEF OGC_IMPLEMENTATION}
function __lwp_mutex_locked(mutex: plwp_mutex): boolean;
begin
result := (mutex^.lock = LWP_MUTEX_LOCKED);
end;
function __lwp_mutex_isinheritprio(attrs: plwp_mutex_attr): boolean;
begin
result := (attrs^.mode = LWP_MUTEX_INHERITPRIO);
end;
function __lwp_mutex_isprioceiling(attrs: plwp_mutex_attr): boolean;
begin
result := (attrs^.mode = LWP_MUTEX_PRIORITYCEIL);
end;
function __lwp_mutex_ispriority(attrs: plwp_mutex_attr): boolean;
begin
result := (attrs^.mode = LWP_MUTEX_PRIORITY);
end;
function __lwp_mutex_isfifo(attrs: plwp_mutex_attr): boolean;
begin
result := (attrs^.mode = LWP_MUTEX_FIFO);
end;
procedure __lwp_mutex_seize(_mutex_t: plwp_mutex; _id: cuint32; _wait: cuint8; _timeout, _level: cuint32); inline;
begin
repeat
if (__lwp_mutex_seize_irq_trylock(_mutex_t, @_level))<> 0 then
begin
if (_wait = 0) then
begin
_CPU_ISR_Restore(_level);
_thr_executing^.wait.ret_code := LWP_MUTEX_UNSATISFIED_NOWAIT;
end else
begin
__lwp_threadqueue_csenter(_mutex_t^.wait_queue);
_thr_executing^.wait.queue^ := _mutex_t^.wait_queue;
_thr_executing^.wait.id := _id;
__lwp_thread_dispatchdisable();
_CPU_ISR_Restore(_level);
__lwp_mutex_seize_irq_blocking(_mutex_t,cuint64(_timeout));
end;
end;
until false;
end;
function __lwp_mutex_seize_irq_trylock(mutex: plwp_mutex; isr_level: pcuint32): cuint32; inline;
var
exec: plwp_cntrl;
level: cuint32;
prioceiling, priocurr: cuint32;
begin
level := isr_level^;
exec := _thr_executing;
exec^.wait.ret_code := LWP_MUTEX_SUCCESSFUL;
if not __lwp_mutex_locked(mutex) then
begin
mutex^.lock := LWP_MUTEX_LOCKED;
mutex^.holder := exec;
mutex^.nest_cnt := 1;
if __lwp_mutex_isinheritprio(@(mutex^.atrrs)) or __lwp_mutex_isprioceiling(@(mutex^.atrrs)) then
inc(exec^.res_cnt);
if not __lwp_mutex_isprioceiling(@(mutex^.atrrs)) then
begin
_CPU_ISR_Restore(level);
result := 0;
end;
begin
prioceiling := mutex^.atrrs.prioceil;
priocurr := exec^.cur_prio;
if (priocurr = prioceiling) then
begin
_CPU_ISR_Restore(level);
result := 0;
end;
if (priocurr > prioceiling) then
begin
__lwp_thread_dispatchdisable();
_CPU_ISR_Restore(level);
__lwp_thread_changepriority(mutex^.holder, mutex^.atrrs.prioceil, 0);
__lwp_thread_dispatchenable();
result := 0;
end;
exec^.wait.ret_code := LWP_MUTEX_CEILINGVIOL;
mutex^.nest_cnt := 0;
dec(exec^.res_cnt);
_CPU_ISR_Restore(level);
result := 0;
end;
result := 0;
end;
if (__lwp_thread_isexec(mutex^.holder)) <> 0 then
begin
case mutex^.atrrs.nest_behavior of
LWP_MUTEX_NEST_ACQUIRE:
begin
inc(mutex^.nest_cnt);
_CPU_ISR_Restore(level);
result := 0;
end;
LWP_MUTEX_NEST_ERROR:
begin
exec^.wait.ret_code := LWP_MUTEX_NEST_NOTALLOWED;
_CPU_ISR_Restore(level);
result := 0;
end;
LWP_MUTEX_NEST_BLOCK:
begin
end;
end;
end;
result := 1;
end;
//{$ifdef LIBOGC_INTERNAL}
//{$include libogc/lwp_mutex.inl}
//{$endif}
{$ENDIF}
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