// Copyright 2011 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. package cgo import "unsafe" // These utility functions are available to be called from code // compiled with gcc via crosscall2. // cgocallback is defined in runtime //go:linkname _runtime_cgocallback runtime.cgocallback func _runtime_cgocallback(unsafe.Pointer, unsafe.Pointer, uintptr, uintptr) // The declaration of crosscall2 is: // void crosscall2(void (*fn)(void *, int), void *, int); // // We need to export the symbol crosscall2 in order to support // callbacks from shared libraries. This applies regardless of // linking mode. // // Compatibility note: crosscall2 actually takes four arguments, but // it works to call it with three arguments when calling _cgo_panic. // That is supported for backward compatibility. //go:cgo_export_static crosscall2 //go:cgo_export_dynamic crosscall2 // Panic. The argument is converted into a Go string. // Call like this in code compiled with gcc: // struct { const char *p; } a; // a.p = /* string to pass to panic */; // crosscall2(_cgo_panic, &a, sizeof a); // /* The function call will not return. */ //go:linkname _runtime_cgo_panic_internal runtime._cgo_panic_internal var _runtime_cgo_panic_internal byte //go:linkname _cgo_panic _cgo_panic //go:cgo_export_static _cgo_panic //go:cgo_export_dynamic _cgo_panic //go:nosplit //go:norace func _cgo_panic(a unsafe.Pointer, n int32) { _runtime_cgocallback(unsafe.Pointer(&_runtime_cgo_panic_internal), a, uintptr(n), 0) } //go:cgo_import_static x_cgo_init //go:linkname x_cgo_init x_cgo_init //go:linkname _cgo_init _cgo_init var x_cgo_init byte var _cgo_init = &x_cgo_init //go:cgo_import_static x_cgo_thread_start //go:linkname x_cgo_thread_start x_cgo_thread_start //go:linkname _cgo_thread_start _cgo_thread_start var x_cgo_thread_start byte var _cgo_thread_start = &x_cgo_thread_start // Creates a new system thread without updating any Go state. // // This method is invoked during shared library loading to create a new OS // thread to perform the runtime initialization. This method is similar to // _cgo_sys_thread_start except that it doesn't update any Go state. //go:cgo_import_static x_cgo_sys_thread_create //go:linkname x_cgo_sys_thread_create x_cgo_sys_thread_create //go:linkname _cgo_sys_thread_create _cgo_sys_thread_create var x_cgo_sys_thread_create byte var _cgo_sys_thread_create = &x_cgo_sys_thread_create // Notifies that the runtime has been initialized. // // We currently block at every CGO entry point (via _cgo_wait_runtime_init_done) // to ensure that the runtime has been initialized before the CGO call is // executed. This is necessary for shared libraries where we kickoff runtime // initialization in a separate thread and return without waiting for this // thread to complete the init. //go:cgo_import_static x_cgo_notify_runtime_init_done //go:linkname x_cgo_notify_runtime_init_done x_cgo_notify_runtime_init_done //go:linkname _cgo_notify_runtime_init_done _cgo_notify_runtime_init_done var x_cgo_notify_runtime_init_done byte var _cgo_notify_runtime_init_done = &x_cgo_notify_runtime_init_done // Sets the traceback context function. See runtime.SetCgoTraceback. //go:cgo_import_static x_cgo_set_context_function //go:linkname x_cgo_set_context_function x_cgo_set_context_function //go:linkname _cgo_set_context_function _cgo_set_context_function var x_cgo_set_context_function byte var _cgo_set_context_function = &x_cgo_set_context_function //go:cgo_export_static _cgo_topofstack //go:cgo_export_dynamic _cgo_topofstack