e1d867b686
This patch adds support for executing multiple concurrent requests on different devices on the same AHCI controller. The libdriver library has been extended to include a generic multithreading interface, and the AHCI driver has been extended to make use of this interface. The original version of this code has been written by Arne Welzel.
72 lines
2.4 KiB
C
72 lines
2.4 KiB
C
/* This file contains a simple thread event implementation.
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*/
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#include <minix/mthread.h>
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#include <minix/sysutil.h>
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#include "event.h"
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/*===========================================================================*
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* driver_event_init *
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*===========================================================================*/
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PUBLIC void driver_event_init(event_t *event)
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{
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/* Initialize an event object.
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*/
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int r;
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if ((r = mthread_mutex_init(&event->mutex, NULL)) != 0)
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panic("libdriver: error initializing mutex (%d)", r);
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if ((r = mthread_cond_init(&event->cond, NULL)) != 0)
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panic("libdriver: error initializing condvar (%d)", r);
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}
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/*===========================================================================*
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* driver_event_destroy *
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*===========================================================================*/
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PUBLIC void driver_event_destroy(event_t *event)
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{
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/* Destroy an event object.
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*/
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int r;
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if ((r = mthread_cond_destroy(&event->cond)) != 0)
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panic("libdriver: error destroying condvar (%d)", r);
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if ((r = mthread_mutex_destroy(&event->mutex)) != 0)
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panic("libdriver: error destroying mutex (%d)", r);
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}
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/*===========================================================================*
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* driver_event_wait *
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*===========================================================================*/
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PUBLIC void driver_event_wait(event_t *event)
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{
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/* Wait for an event, blocking the current thread in the process.
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*/
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int r;
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if ((r = mthread_mutex_lock(&event->mutex)) != 0)
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panic("libdriver: error locking mutex (%d)", r);
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if ((r = mthread_cond_wait(&event->cond, &event->mutex)) != 0)
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panic("libdriver: error waiting for condvar (%d)", r);
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if ((r = mthread_mutex_unlock(&event->mutex)) != 0)
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panic("libdriver: error unlocking mutex (%d)", r);
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}
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/*===========================================================================*
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* driver_event_fire *
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*===========================================================================*/
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PUBLIC void driver_event_fire(event_t *event)
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{
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/* Fire an event, waking up any thread blocked on it without scheduling it.
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*/
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int r;
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if ((r = mthread_mutex_lock(&event->mutex)) != 0)
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panic("libdriver: error locking mutex (%d)", r);
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if ((r = mthread_cond_signal(&event->cond)) != 0)
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panic("libdriver: error signaling condvar (%d)", r);
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if ((r = mthread_mutex_unlock(&event->mutex)) != 0)
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panic("libdriver: error unlocking mutex (%d)", r);
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}
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