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Fork.pm  view on Meta::CPAN

perl version, or parts of a distribution are newer than the ones already
loaded.

This module supports creating pre-initialised perl processes to be used as
a template for new processes at a later time, e.g. for use in a process
pool.

=item Forking might be impossible when a program is running.

For example, POSIX makes it almost impossible to fork from a
multi-threaded program while doing anything useful in the child - in
fact, if your perl program uses POSIX threads (even indirectly via
e.g. L<IO::AIO> or L<threads>), you cannot call fork on the perl level
anymore without risking memory corruption or worse on a number of
operating systems.

This module can safely fork helper processes at any time, by calling
fork+exec in C, in a POSIX-compatible way (via L<Proc::FastSpawn>).

=item Parallel processing with fork might be inconvenient or difficult
to implement. Modules might not work in both parent and child.

For example, when a program uses an event loop and creates watchers it

README  view on Meta::CPAN

        and modules are no longer loadable because they refer to a different
        perl version, or parts of a distribution are newer than the ones
        already loaded.

        This module supports creating pre-initialised perl processes to be
        used as a template for new processes at a later time, e.g. for use
        in a process pool.

    Forking might be impossible when a program is running.
        For example, POSIX makes it almost impossible to fork from a
        multi-threaded program while doing anything useful in the child - in
        fact, if your perl program uses POSIX threads (even indirectly via
        e.g. IO::AIO or threads), you cannot call fork on the perl level
        anymore without risking memory corruption or worse on a number of
        operating systems.

        This module can safely fork helper processes at any time, by calling
        fork+exec in C, in a POSIX-compatible way (via Proc::FastSpawn).

    Parallel processing with fork might be inconvenient or difficult to
    implement. Modules might not work in both parent and child.
        For example, when a program uses an event loop and creates watchers
        it becomes very hard to use the event loop from a child program, as