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core.internal.gc.os

Contains OS-level routines needed by the garbage collector.

License:

Boost License 1.0.

Authors:

Walter Bright, David Friedman, Sean Kelly, Leandro Lucarella

enum ChildStatus: int;

Possible results for the wait_pid() function.

done: The process has finished successfully
running: The process is still running
error: There was an error waiting for the process

nothrow @nogc ChildStatus wait_pid(pid_t pid, bool block = true);

Wait for a process with PID pid to finish.

If block is false, this function will not block, and return ChildStatus.running if the process is still running. Otherwise it will return always ChildStatus.done (unless there is an error, in which case ChildStatus.error is returned).

nothrow @nogc bool isLowOnMem(size_t mapped);

Check for any kind of memory pressure.

Parameters:

size_t mapped the amount of memory mapped by the GC in bytes

Returns:

true if memory is scarce

nothrow @nogc ulong os_physical_mem(bool avail);

Get the size of available physical memory

Parameters:

bool avail if supported on the current platform, return the currently unused memory rather than the installed physical memory

Returns:

size of installed physical RAM

Library Reference

core.internal.gc.os