diff options
Diffstat (limited to 'src/pkg/runtime/cgo/callbacks.c')
-rw-r--r-- | src/pkg/runtime/cgo/callbacks.c | 73 |
1 files changed, 0 insertions, 73 deletions
diff --git a/src/pkg/runtime/cgo/callbacks.c b/src/pkg/runtime/cgo/callbacks.c deleted file mode 100644 index f36fb3fd7..000000000 --- a/src/pkg/runtime/cgo/callbacks.c +++ /dev/null @@ -1,73 +0,0 @@ -// 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. - -#include "../runtime.h" -#include "../cgocall.h" - -// These utility functions are available to be called from code -// compiled with gcc via crosscall2. - -// 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. -#pragma dynexport crosscall2 crosscall2 - -// Allocate memory. This allocates the requested number of bytes in -// memory controlled by the Go runtime. The allocated memory will be -// zeroed. You are responsible for ensuring that the Go garbage -// collector can see a pointer to the allocated memory for as long as -// it is valid, e.g., by storing a pointer in a local variable in your -// C function, or in memory allocated by the Go runtime. If the only -// pointers are in a C global variable or in memory allocated via -// malloc, then the Go garbage collector may collect the memory. - -// Call like this in code compiled with gcc: -// struct { size_t len; void *ret; } a; -// a.len = /* number of bytes to allocate */; -// crosscall2(_cgo_allocate, &a, sizeof a); -// /* Here a.ret is a pointer to the allocated memory. */ - -static void -_cgo_allocate_internal(uintptr len, byte *ret) -{ - ret = runtime·mal(len); - FLUSH(&ret); -} - -#pragma dynexport _cgo_allocate _cgo_allocate -void -_cgo_allocate(void *a, int32 n) -{ - runtime·cgocallback((void(*)(void))_cgo_allocate_internal, a, n); -} - -// 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. */ - -extern void ·cgoStringToEface(String, Eface*); - -static void -_cgo_panic_internal(byte *p) -{ - String s; - Eface err; - - s = runtime·gostring(p); - ·cgoStringToEface(s, &err); - runtime·panic(err); -} - -#pragma dynexport _cgo_panic _cgo_panic -void -_cgo_panic(void *a, int32 n) -{ - runtime·cgocallback((void(*)(void))_cgo_panic_internal, a, n); -} |