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52 lines
1.4 KiB
52 lines
1.4 KiB
#pragma once
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#include <assert.h>
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#include <stdint.h>
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#include "arch/getcycles.h"
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#include "local_runqueue.h"
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#include "panic.h"
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#include "sandbox_state_history.h"
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#include "sandbox_types.h"
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/**
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* Transitions a sandbox to the SANDBOX_PREEMPTED state.
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*
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* This occurs when a sandbox is preempted in the SIGALRM handler
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*
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* @param sandbox
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* @param last_state the state the sandbox is transitioning from. This is expressed as a constant to
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* enable the compiler to perform constant propagation optimizations.
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*/
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static inline void
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sandbox_set_as_preempted(struct sandbox *sandbox, sandbox_state_t last_state)
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{
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assert(sandbox);
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sandbox->state = SANDBOX_PREEMPTED;
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uint64_t now = __getcycles();
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switch (last_state) {
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case SANDBOX_INTERRUPTED: {
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break;
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}
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default: {
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panic("Sandbox %lu | Illegal transition from %s to Preempted\n", sandbox->id,
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sandbox_state_stringify(last_state));
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}
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}
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/* State Change Bookkeeping */
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sandbox->duration_of_state[last_state] += (now - sandbox->timestamp_of.last_state_change);
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sandbox->timestamp_of.last_state_change = now;
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sandbox_state_history_append(sandbox, SANDBOX_PREEMPTED);
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runtime_sandbox_total_increment(SANDBOX_PREEMPTED);
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runtime_sandbox_total_decrement(last_state);
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}
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static inline void
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sandbox_preempt(struct sandbox *sandbox)
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{
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assert(sandbox->state == SANDBOX_INTERRUPTED);
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sandbox_set_as_preempted(sandbox, SANDBOX_INTERRUPTED);
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}
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