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49 lines
1.4 KiB
49 lines
1.4 KiB
4 years ago
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#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 "sandbox_types.h"
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#include "sandbox_state.h"
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/**
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* Transitions a sandbox to the SANDBOX_BLOCKED state.
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* This occurs when a sandbox is executing and it makes a blocking API call of some kind.
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* Automatically removes the sandbox from the runqueue
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* @param sandbox the blocking 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_blocked(struct sandbox *sandbox, sandbox_state_t last_state)
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{
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assert(sandbox);
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uint64_t now = __getcycles();
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uint64_t duration_of_last_state = now - sandbox->last_state_change_timestamp;
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sandbox->state = SANDBOX_SET_AS_BLOCKED;
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switch (last_state) {
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case SANDBOX_RUNNING: {
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sandbox->running_duration += duration_of_last_state;
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local_runqueue_delete(sandbox);
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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 Blocked\n", sandbox->id,
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sandbox_state_stringify(last_state));
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}
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}
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sandbox->last_state_change_timestamp = now;
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sandbox->state = SANDBOX_BLOCKED;
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/* State Change Bookkeeping */
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sandbox_state_log_transition(sandbox->id, last_state, SANDBOX_BLOCKED);
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runtime_sandbox_total_increment(SANDBOX_BLOCKED);
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runtime_sandbox_total_decrement(last_state);
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}
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