xz-archive/src/xz/hardware.h

///////////////////////////////////////////////////////////////////////////////
//
/// \file       hardware.h
/// \brief      Detection of available hardware resources
//
//  Author:     Lasse Collin
//
//  This file has been put into the public domain.
//  You can do whatever you want with this file.
//
///////////////////////////////////////////////////////////////////////////////

/// Initialize some hardware-specific variables, which are needed by other
/// hardware_* functions.
extern void hardware_init(void);


/// Set custom value for maximum number of coder threads.
extern void hardware_threadlimit_set(uint32_t threadlimit);

/// Get the maximum number of coder threads. Some additional helper threads
/// are allowed on top of this).
extern uint32_t hardware_threadlimit_get(void);


/// Set custom memory usage limit. This is used for both encoding and
/// decoding. Zero indicates resetting the limit back to defaults.
extern void hardware_memlimit_set(uint64_t memlimit);

/// Set custom memory usage limit as a percentage of installed RAM.
/// The percentage must be in the range [1, 100].
extern void hardware_memlimit_set_percentage(uint32_t percentage);

/// Get the current memory usage limit.
extern uint64_t hardware_memlimit_get(void);