basic_osyncstream( streambuf_type* buf, const Allocator& a );
(1)explicit basic_osyncstream( streambuf_type* buf );
(2) (3) (4) (5)Constructs new synchronized output stream.
5)Move constructor. Move-constructs the
std::basic_ostreambase and the std::basic_syncbuf member from the corresponding subobjects of
other, then calls
set_rdbufwith the pointer to the newly-constructed underlying
std::basic_syncbufto complete the initialization of the base. After this move constructor,
other.get_wrapped()returns
nullptrand destruction of
otherproduces no output.
[edit] Parameters buf - pointer to the std::basic_streambuf that will be wrapped os - reference to a std::basic_ostream, whose rdbuf() will be wrapped a - the allocator to pass to the constructor of the member std::basic_syncbuf other - another osyncstream to move from [edit] Example#include <iostream>
#include <string_view>
#include <syncstream>
#include <thread>
void worker(const int id, std::ostream &os)
{
std::string_view block;
switch (id)
{
default: [[fallthrough]];
case 0: block = "ââ";
break;
case 1: block = "ââ";
break;
case 2: block = "ââ";
break;
case 3: block = "ââ";
break;
}
for (int i = 1; i <= 50; ++i)
os << block << std::flush;
os << std::endl;
}
int main()
{
std::cout << "Synchronized output should not cause any interference:" << std::endl;
{
auto scout1 = std::osyncstream{std::cout};
auto scout2 = std::osyncstream{std::cout};
auto scout3 = std::osyncstream{std::cout};
auto scout4 = std::osyncstream{std::cout};
auto w1 = std::jthread{worker, 0, std::ref(scout1)};
auto w2 = std::jthread{worker, 1, std::ref(scout2)};
auto w3 = std::jthread{worker, 2, std::ref(scout3)};
auto w4 = std::jthread{worker, 3, std::ref(scout4)};
}
std::cout << "\nLack of synchronization may cause some interference on output:"
<< std::endl;
{
auto w1 = std::jthread{worker, 0, std::ref(std::cout)};
auto w2 = std::jthread{worker, 1, std::ref(std::cout)};
auto w3 = std::jthread{worker, 2, std::ref(std::cout)};
auto w4 = std::jthread{worker, 3, std::ref(std::cout)};
}
}
Possible output:
Synchronized output should not cause any interference: ââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââ ââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââ ââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââ ââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââ Lack of synchronization may cause some interference on output: ââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââ ââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââ ââââââââââââââââââââââââââââââââââââââââââââââââââââââââââ ââââââ[edit] See also constructs a
basic_syncbuf object
std::basic_syncbuf<CharT,Traits,Allocator>) [edit]
RetroSearch is an open source project built by @garambo | Open a GitHub Issue
Search and Browse the WWW like it's 1997 | Search results from DuckDuckGo
HTML:
3.2
| Encoding:
UTF-8
| Version:
0.7.4