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