vendor dependencies, make some changes to how input is done

vendor/github.com/ebitengine/purego/internal/fakecgo/go_libinit.go

@@ -0,0 +1,66 @@
+// SPDX-License-Identifier: Apache-2.0
+// SPDX-FileCopyrightText: 2022 The Ebitengine Authors
+
+//go:build darwin || freebsd || linux
+
+package fakecgo
+
+import (
+	"syscall"
+	"unsafe"
+)
+
+var (
+	pthread_g pthread_key_t
+
+	runtime_init_cond = PTHREAD_COND_INITIALIZER
+	runtime_init_mu   = PTHREAD_MUTEX_INITIALIZER
+	runtime_init_done int
+)
+
+//go:nosplit
+func x_cgo_notify_runtime_init_done() {
+	pthread_mutex_lock(&runtime_init_mu)
+	runtime_init_done = 1
+	pthread_cond_broadcast(&runtime_init_cond)
+	pthread_mutex_unlock(&runtime_init_mu)
+}
+
+// Store the g into a thread-specific value associated with the pthread key pthread_g.
+// And pthread_key_destructor will dropm when the thread is exiting.
+func x_cgo_bindm(g unsafe.Pointer) {
+	// We assume this will always succeed, otherwise, there might be extra M leaking,
+	// when a C thread exits after a cgo call.
+	// We only invoke this function once per thread in runtime.needAndBindM,
+	// and the next calls just reuse the bound m.
+	pthread_setspecific(pthread_g, g)
+}
+
+// _cgo_try_pthread_create retries pthread_create if it fails with
+// EAGAIN.
+//
+//go:nosplit
+//go:norace
+func _cgo_try_pthread_create(thread *pthread_t, attr *pthread_attr_t, pfn unsafe.Pointer, arg *ThreadStart) int {
+	var ts syscall.Timespec
+	// tries needs to be the same type as syscall.Timespec.Nsec
+	// but the fields are int32 on 32bit and int64 on 64bit.
+	// tries is assigned to syscall.Timespec.Nsec in order to match its type.
+	tries := ts.Nsec
+	var err int
+
+	for tries = 0; tries < 20; tries++ {
+		err = int(pthread_create(thread, attr, pfn, unsafe.Pointer(arg)))
+		if err == 0 {
+			pthread_detach(*thread)
+			return 0
+		}
+		if err != int(syscall.EAGAIN) {
+			return err
+		}
+		ts.Sec = 0
+		ts.Nsec = (tries + 1) * 1000 * 1000 // Milliseconds.
+		nanosleep(&ts, nil)
+	}
+	return int(syscall.EAGAIN)
+}