9fa667ce63
This change implements __sync atomic polyfill libcalls by disabling interrupts. This was previously done in a limited capacity on some targets, but this change uses a go:generate to emit all of the calls on all microcontroller targets.
34 строки
771 Б
Go
34 строки
771 Б
Go
//go:build tinygo.riscv
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// +build tinygo.riscv
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package runtime
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import "device/riscv"
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func getCurrentStackPointer() uintptr {
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return uintptr(stacksave())
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}
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// The safest thing to do here would just be to disable interrupts for
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// procPin/procUnpin. Note that a global variable is safe in this case, as any
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// access to procPinnedMask will happen with interrupts disabled.
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var procPinnedMask uintptr
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//go:linkname procPin sync/atomic.runtime_procPin
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func procPin() {
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procPinnedMask = riscv.DisableInterrupts()
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}
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//go:linkname procUnpin sync/atomic.runtime_procUnpin
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func procUnpin() {
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riscv.EnableInterrupts(procPinnedMask)
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}
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func waitForEvents() {
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mask := riscv.DisableInterrupts()
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if !runqueue.Empty() {
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riscv.Asm("wfi")
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}
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riscv.EnableInterrupts(mask)
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}
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