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#include <unistd.h>
#include <stdlib.h>
#include <sys/types.h>
#include <asm/bitops.h>
#include <os/dbgu.h>
#include <os/req_ctx.h>
#include "../openpcd.h"
/* FIXME: locking, FIFO order processing */
static struct req_ctx req_ctx[NUM_REQ_CTX];
struct req_ctx *req_ctx_find_get(unsigned long old_state, unsigned long new_state)
{
unsigned long flags;
u_int8_t i;
for (i = 0; i < NUM_REQ_CTX; i++) {
local_irq_save(flags);
if (req_ctx[i].state == old_state) {
req_ctx[i].state = new_state;
local_irq_restore(flags);
return &req_ctx[i];
}
local_irq_restore(flags);
}
return NULL;
}
u_int8_t req_ctx_num(struct req_ctx *ctx)
{
return ((char *)ctx - (char *)&req_ctx[0])/sizeof(*ctx);
}
void req_ctx_set_state(struct req_ctx *ctx, unsigned long new_state)
{
unsigned long flags;
/* FIXME: do we need this kind of locking, we're UP! */
local_irq_save(flags);
ctx->state = new_state;
local_irq_restore(flags);
}
void req_ctx_put(struct req_ctx *ctx)
{
req_ctx_set_state(ctx, RCTX_STATE_FREE);
}
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