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https://github.com/tinygo-org/tinygo.git
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Ayke van Laethem
d1fe02df23
This moves all scheduler code into a separate file that is only compiled
when there's a scheduler in use (the tasks or asyncify scheduler, which
are both cooperative). The main goal of this change is to make it easier
to add a new "scheduler" based on OS threads.
It also fixes a few subtle issues with `-gc=none`:
- Gosched() panicked. This is now fixed to just return immediately
(the only logical thing to do when there's only one goroutine).
- Timers aren't supported without a scheduler, but the relevant code
was still present and would happily add a timer to the queue. It
just never ran. So now it exits with a runtime error, similar to any
blocking operation.
39 lines
1.1 KiB
Go
39 lines
1.1 KiB
Go
package task
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import (
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"unsafe"
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)
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// Task is a state of goroutine for scheduling purposes.
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type Task struct {
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// Next is a field which can be used to make a linked list of tasks.
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Next *Task
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// Ptr is a field which can be used for storing a pointer.
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Ptr unsafe.Pointer
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// Data is a field which can be used for storing state information.
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Data uint64
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// gcData holds data for the GC.
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gcData gcData
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// state is the underlying running state of the task.
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state state
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// DeferFrame stores a pointer to the (stack allocated) defer frame of the
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// goroutine that is used for the recover builtin.
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DeferFrame unsafe.Pointer
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}
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// getGoroutineStackSize is a compiler intrinsic that returns the stack size for
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// the given function and falls back to the default stack size. It is replaced
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// with a load from a special section just before codegen.
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func getGoroutineStackSize(fn uintptr) uintptr
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//go:linkname runtime_alloc runtime.alloc
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func runtime_alloc(size uintptr, layout unsafe.Pointer) unsafe.Pointer
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//go:linkname scheduleTask runtime.scheduleTask
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func scheduleTask(*Task)
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