Boost
C++ Libraries
...one of the most highly
regarded and expertly designed C++ library projects in the
world.
— Herb Sutter and Andrei
Alexandrescu, C++
Coding Standards
Boost
C++ Libraries
...one of the most highly
regarded and expertly designed C++ library projects in the
world.
— Herb Sutter and Andrei
Alexandrescu, C++
Coding Standards
The library is fully thread safe and re-entrant provided the function and
class templates in the library are instantiated with built-in floating point
types: i.e. the types float,
double and long
double.
However, the library is not thread safe when used with user-defined (i.e. class type) numeric types.
The reason for the latter limitation is the need to initialise symbolic constants using constructs such as:
static const T coefficient_array = { ... list of values ... };
Which is always thread safe when T is a built-in floating point type, but not when T is a user defined type: as in this case there is a need for T's constructors to be run, leading to potential race conditions.
This limitation may be addressed in a future release.