blob: 10d8680e14f8daaa6c93978fb178d12e6445f869 (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
|
// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#pragma once
#include "macro.h"
#include "stringfmt.h"
namespace vespalib {
/**
* This class contains a message that will be printed to stderr if the
* object is destructed due to stack unwinding caused by an exception.
**/
class UnwindMessage {
private:
int _num_active;
vespalib::string _message;
public:
UnwindMessage(const vespalib::string &msg);
UnwindMessage(UnwindMessage &&rhs) noexcept ;
UnwindMessage(const UnwindMessage &) = delete;
UnwindMessage &operator=(const UnwindMessage &) = delete;
UnwindMessage &operator=(UnwindMessage &&) = delete;
~UnwindMessage();
};
extern UnwindMessage unwind_msg(const char *fmt, ...) __attribute__ ((format (printf,1,2)));
// make an unwind message with a hopefully unique name on the stack
#define UNWIND_MSG(...) auto VESPA_CAT(unwindMessageOnLine, __LINE__) = unwind_msg(__VA_ARGS__)
// make an unwind message quoting a piece of code and then perform that code
#define UNWIND_DO(...) do { UNWIND_MSG("%s:%d: %s", __FILE__, __LINE__, VESPA_STRINGIZE(__VA_ARGS__)); __VA_ARGS__; } while(false)
} // namespace
|
