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///////////////////////////////////////////////////////////////////////////////
//
/// \file hardware.c
/// \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.
//
///////////////////////////////////////////////////////////////////////////////
#include "private.h"
#include "tuklib_physmem.h"
#include "tuklib_cpucores.h"
/// Maximum number of free *coder* threads. This can be set with
/// the --threads=NUM command line option.
static uint32_t threadlimit;
/// Memory usage limit
static uint64_t memlimit;
extern void
hardware_threadlimit_set(uint32_t new_threadlimit)
{
if (new_threadlimit == 0) {
// The default is the number of available CPU cores.
threadlimit = tuklib_cpucores();
if (threadlimit == 0)
threadlimit = 1;
} else {
threadlimit = new_threadlimit;
}
return;
}
extern uint32_t
hardware_threadlimit_get(void)
{
return threadlimit;
}
extern void
hardware_memlimit_set(uint64_t new_memlimit)
{
if (new_memlimit == 0) {
// The default is 40 % of total installed physical RAM.
hardware_memlimit_set_percentage(40);
} else {
memlimit = new_memlimit;
}
return;
}
extern void
hardware_memlimit_set_percentage(uint32_t percentage)
{
assert(percentage > 0);
assert(percentage <= 100);
uint64_t mem = tuklib_physmem();
// If we cannot determine the amount of RAM, assume 32 MiB. Maybe
// even that is too much on some systems. But on most systems it's
// far too little, and can be annoying.
if (mem == 0)
mem = UINT64_C(32) * 1024 * 1024;
memlimit = percentage * mem / 100;
return;
}
extern uint64_t
hardware_memlimit_get(void)
{
return memlimit;
}
extern void
hardware_init(void)
{
hardware_memlimit_set(0);
hardware_threadlimit_set(0);
return;
}
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