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Merge branch 'atomic_variadic_log'

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This commit is contained in:
Gioacchino Mazzurco 2020-05-30 22:11:04 +02:00
commit 0c1785b0d3
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1 changed files with 53 additions and 18 deletions
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71
libretroshare/src/util/rsdebug.h
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@ -48,6 +48,18 @@ struct t_RsLogger
{
inline t_RsLogger() = default;
/** Offer variadic style too, as a benefit this has better atomicity then
* << style, but doesn't supports manipulators and things like std::endl
* @see https://stackoverflow.com/a/27375675 */
template <typename Arg, typename... Args>
inline t_RsLogger(Arg&& arg, Args&&... args)
{
ostr << std::forward<Arg>(arg);
using expander = int[];
(void)expander{0, (void(ostr << std::forward<Args>(args)), 0)...};
mFlush();
}
/** On other platforms expose the type of underlying stream.
* On Android it cannot work like that so return the class type itself
* just for code compatibility with other platforms */
@ -66,12 +78,7 @@ struct t_RsLogger
{
if(pf == static_cast<std::ostream& (*)(std::ostream&)>(
&std::endl< char, std::char_traits<char> > ))
{
__android_log_write(
static_cast<int>(CATEGORY),
"RetroShare", ostr.str().c_str() );
ostr.str() = "";
}
mFlush();
else ostr << pf;
return *this;
@ -84,6 +91,14 @@ struct t_RsLogger
private:
std::ostringstream ostr;
void mFlush()
{
__android_log_write(
static_cast<int>(CATEGORY),
"RetroShare", ostr.str().c_str() );
ostr.str() = "";
}
};
#else // def __ANDROID__
@ -105,13 +120,38 @@ enum class RsLoggerCategories
template <RsLoggerCategories CATEGORY>
struct t_RsLogger
{
inline t_RsLogger() = default;
/// Expose the type of underlying stream
using stream_type = decltype(std::cerr);
/// Return underlying stream to write avoiding additional prefixes
static inline stream_type& uStream() { return std::cerr; }
inline t_RsLogger() = default;
/** Offer variadic style too, as a benefit this has better atomicity then
* << style, but doesn't supports manipulators and things like std::endl
* @see https://stackoverflow.com/a/27375675 */
template <typename Arg, typename... Args>
inline t_RsLogger(Arg&& arg, Args&&... args)
{
std::ostringstream ostr;
ostr << getPrefix() << std::forward<Arg>(arg);
using expander = int[];
(void)expander{0, (void(ostr << std::forward<Args>(args)), 0)...};
ostr << std::endl;
uStream() << ostr.str();
}
template<typename T>
inline stream_type& operator<<(const T& val)
{ return uStream() << getPrefix() << val; }
/// needed for manipulators and things like std::endl
stream_type& operator<<(std::ostream& (*pf)(std::ostream&))
{ return uStream() << pf; }
private:
std::string getPrefix()
{
using namespace std::chrono;
const auto now = system_clock::now();
@ -121,22 +161,15 @@ struct t_RsLogger
tstream << static_cast<char>(CATEGORY) << " "
<< sec.time_since_epoch().count() << "."
<< std::setfill('0') << std::setw(3) << msec.count()
<< " " << val;
return std::cerr << tstream.str();
<< " ";
return tstream.str();
}
/// needed for manipulators and things like std::endl
stream_type& operator<<(std::ostream& (*pf)(std::ostream&))
{ return std::cerr << pf; }
/// Return underlying stream to write avoiding additional prefixes
inline stream_type& uStream() const { return std::cerr; }
};
#endif // def __ANDROID__
/**
* Comfortable debug message loggin, supports chaining like std::cerr but can
* Comfortable debug message logging, supports chaining like std::cerr but can
* be easly and selectively disabled at compile time to reduce generated binary
* size and performance impact without too many \#ifdef around.
*
@ -196,6 +229,8 @@ struct RsNoDbg
{
inline RsNoDbg() = default;
template <typename T, typename... Args> inline RsNoDbg(T, Args...) {}
/** Defined as the type itself just for code compatibility with other
* logging classes */
using stream_type = RsNoDbg;