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43 lines
1.4 KiB
43 lines
1.4 KiB
#pragma once
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#include <assert.h>
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#include <stddef.h>
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#include "current_sandbox.h"
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#include "current_sandbox_yield.h"
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#include "generic_thread.h"
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#include "local_runqueue.h"
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#include "sandbox_set_as_blocked.h"
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#include "software_interrupt.h"
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/**
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* Mark the currently executing sandbox as blocked, remove it from the local runqueue,
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* and switch to base context
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*/
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static inline void
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current_sandbox_block(void)
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{
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/* Remove the sandbox we were just executing from the runqueue and mark as blocked */
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struct sandbox *current_sandbox = current_sandbox_get();
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/* We might either have blocked in start reading the request or while executing within the WebAssembly
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* entrypoint. The preemptable flag on the context is used to differentiate. In either case, we should
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* have disabled interrupts.
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*/
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if (current_sandbox->ctxt.preemptable) software_interrupt_disable();
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assert(!software_interrupt_is_enabled());
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assert(current_sandbox->state == SANDBOX_RUNNING);
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sandbox_set_as_blocked(current_sandbox, SANDBOX_RUNNING);
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generic_thread_dump_lock_overhead();
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/* The worker thread seems to "spin" on a blocked sandbox, so try to execute another sandbox for one quantum
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* after blocking to give time for the action to resolve */
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struct sandbox *next_sandbox = local_runqueue_get_next();
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if (next_sandbox != NULL) {
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sandbox_switch_to(next_sandbox);
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} else {
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current_sandbox_yield();
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};
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}
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