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Virtual function called by the public member function pubsync to synchronize the contents in the buffer with those of the associated character sequence.
Its default behavior in streambuf is to do nothing and return zero (indicating success), but derived classes that use intermediate buffers shall override this behavior to properly synchronize them: filebuf overrides this virtual member function (see filebuf::sync).
A value of
Reference
C library:
- <cassert> (assert.h)
- <cctype> (ctype.h)
- <cerrno> (errno.h)
-
<cfenv> (fenv.h)C++11
- <cfloat> (float.h)
-
<cinttypes> (inttypes.h)C++11
- <ciso646> (iso646.h)
- <climits> (limits.h)
- <clocale> (locale.h)
- <cmath> (math.h)
- <csetjmp> (setjmp.h)
- <csignal> (signal.h)
- <cstdarg> (stdarg.h)
-
<cstdbool> (stdbool.h)C++11
- <cstddef> (stddef.h)
-
<cstdint> (stdint.h)C++11
- <cstdio> (stdio.h)
- <cstdlib> (stdlib.h)
- <cstring> (string.h)
-
<ctgmath> (tgmath.h)C++11
- <ctime> (time.h)
-
<cuchar> (uchar.h)C++11
- <cwchar> (wchar.h)
- <cwctype> (wctype.h)
Containers:
-
<array>C++11
- <deque>
-
<forward_list>C++11
- <list>
- <map>
- <queue>
- <set>
- <stack>
-
<unordered_map>C++11
-
<unordered_set>C++11
- <vector>
-
Input/Output:
Multi-threading:
-
<atomic>C++11
-
<condition_variable>C++11
-
<future>C++11
-
<mutex>C++11
-
<thread>C++11
-
Other:
- <algorithm>
- <bitset>
-
<chrono>C++11
-
<codecvt>C++11
- <complex>
- <exception>
- <functional>
-
<initializer_list>C++11
- <iterator>
- <limits>
- <locale>
- <memory>
- <new>
- <numeric>
-
<random>C++11
-
<ratio>C++11
-
<regex>C++11
- <stdexcept>
- <string>
-
<system_error>C++11
-
<tuple>C++11
-
<type_traits>C++11
-
<typeindex>C++11
- <typeinfo>
- <utility>
- <valarray>
streambuf
- streambuf::~streambuf
- streambuf::streambuf
public members
protected members
virtual protected members
protected virtual member function
<streambuf> <iostream>
std::streambuf::sync
int sync();
Synchronize stream buffer
Its default behavior in streambuf is to do nothing and return zero (indicating success), but derived classes that use intermediate buffers shall override this behavior to properly synchronize them: filebuf overrides this virtual member function (see filebuf::sync).
Parameters
noneReturn Value
Returns zero, which indicates success.A value of
-1 would indicate failure.Data races
Introduces no data races, but overriden versions in derived classes may.Exception safety
No-throw guarantee: this default definition never throws exceptions.See also
- streambuf::pubsync
- Synchronize stream buffer (public member function)
- filebuf::sync
- Synchronize buffer (protected virtual member function)
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Spotted an error? contact us