Memory.cpp

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// ======================================================================
// \title Os/Linux/Memory.cpp
// \brief Linux implementation for Os::Memory
// ======================================================================
#include <sys/sysinfo.h>
#include <Fw/Types/Assert.hpp>
#include <Os/Linux/Memory.hpp>
#include <cstdio>
#include <limits>
namespace Os {
namespace Linux {
namespace Memory {

MemoryInterface::Status LinuxMemory::_getUsage(Os::Memory::Usage& memory_usage) {
    struct sysinfo info;
    // Only error in sysinfo call is invalid address
    const int sysinfoStatus = sysinfo(&info);
    FW_ASSERT(sysinfoStatus == 0);
    FW_ASSERT(info.mem_unit > 0);
    const FwSizeType MAX_MEASURABLE_RAM_UNITS = std::numeric_limits<FwSizeType>::max() / info.mem_unit;
    if ((MAX_MEASURABLE_RAM_UNITS < info.totalram) || (MAX_MEASURABLE_RAM_UNITS < info.freeram)) {
        memory_usage.total = 1;
        memory_usage.used = 1;
        return Status::ERROR;
    }

    memory_usage.total = info.totalram * info.mem_unit;
    memory_usage.used = (info.totalram - info.freeram) * info.mem_unit;
    return Status::OP_OK;
}

MemoryHandle* LinuxMemory::getHandle() {
    return &this->m_handle;
}

}  // namespace Memory
}  // namespace Linux
}  // namespace Os