Adding upstream version 1.18.10.upstream/1.18.10upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 125 insertions, 0 deletions

diff --git a/src/runtime/cgo/gcc_libinit_windows.c b/src/runtime/cgo/gcc_libinit_windows.c
new file mode 100644
index 0000000..ad50386
--- /dev/null
+++ b/src/runtime/cgo/gcc_libinit_windows.c
@@ -0,0 +1,125 @@
+// Copyright 2015 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build cgo
+
+#define WIN32_LEAN_AND_MEAN
+#include <windows.h>
+#include <process.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <errno.h>
+
+#include "libcgo.h"
+
+static volatile LONG runtime_init_once_gate = 0;
+static volatile LONG runtime_init_once_done = 0;
+
+static CRITICAL_SECTION runtime_init_cs;
+
+static HANDLE runtime_init_wait;
+static int runtime_init_done;
+
+// Pre-initialize the runtime synchronization objects
+void
+_cgo_preinit_init() {
+	 runtime_init_wait = CreateEvent(NULL, TRUE, FALSE, NULL);
+	 if (runtime_init_wait == NULL) {
+		fprintf(stderr, "runtime: failed to create runtime initialization wait event.\n");
+		abort();
+	 }
+
+	 InitializeCriticalSection(&runtime_init_cs);
+}
+
+// Make sure that the preinit sequence has run.
+void
+_cgo_maybe_run_preinit() {
+	 if (!InterlockedExchangeAdd(&runtime_init_once_done, 0)) {
+			if (InterlockedIncrement(&runtime_init_once_gate) == 1) {
+				 _cgo_preinit_init();
+				 InterlockedIncrement(&runtime_init_once_done);
+			} else {
+				 // Decrement to avoid overflow.
+				 InterlockedDecrement(&runtime_init_once_gate);
+				 while(!InterlockedExchangeAdd(&runtime_init_once_done, 0)) {
+						Sleep(0);
+				 }
+			}
+	 }
+}
+
+void
+x_cgo_sys_thread_create(void (*func)(void*), void* arg) {
+	uintptr_t thandle;
+
+	thandle = _beginthread(func, 0, arg);
+	if(thandle == -1) {
+		fprintf(stderr, "runtime: failed to create new OS thread (%d)\n", errno);
+		abort();
+	}
+}
+
+int
+_cgo_is_runtime_initialized() {
+	 EnterCriticalSection(&runtime_init_cs);
+	 int status = runtime_init_done;
+	 LeaveCriticalSection(&runtime_init_cs);
+	 return status;
+}
+
+uintptr_t
+_cgo_wait_runtime_init_done(void) {
+	void (*pfn)(struct context_arg*);
+
+	 _cgo_maybe_run_preinit();
+	while (!_cgo_is_runtime_initialized()) {
+			WaitForSingleObject(runtime_init_wait, INFINITE);
+	}
+	pfn = _cgo_get_context_function();
+	if (pfn != nil) {
+		struct context_arg arg;
+
+		arg.Context = 0;
+		(*pfn)(&arg);
+		return arg.Context;
+	}
+	return 0;
+}
+
+void
+x_cgo_notify_runtime_init_done(void* dummy) {
+	 _cgo_maybe_run_preinit();
+
+	 EnterCriticalSection(&runtime_init_cs);
+	runtime_init_done = 1;
+	 LeaveCriticalSection(&runtime_init_cs);
+
+	 if (!SetEvent(runtime_init_wait)) {
+		fprintf(stderr, "runtime: failed to signal runtime initialization complete.\n");
+		abort();
+	}
+}
+
+// The context function, used when tracing back C calls into Go.
+static void (*cgo_context_function)(struct context_arg*);
+
+// Sets the context function to call to record the traceback context
+// when calling a Go function from C code. Called from runtime.SetCgoTraceback.
+void x_cgo_set_context_function(void (*context)(struct context_arg*)) {
+	EnterCriticalSection(&runtime_init_cs);
+	cgo_context_function = context;
+	LeaveCriticalSection(&runtime_init_cs);
+}
+
+// Gets the context function.
+void (*(_cgo_get_context_function(void)))(struct context_arg*) {
+	void (*ret)(struct context_arg*);
+
+	EnterCriticalSection(&runtime_init_cs);
+	ret = cgo_context_function;
+	LeaveCriticalSection(&runtime_init_cs);
+	return ret;
+}