Function cpu_getPageSize

quest/src/cpu/cpu_config.cpp:145–176

long cpu_getPageSize() {

    // avoid repeated queries to this fixed value
    static long pageSize = 0;
    if (pageSize > 0)
        return pageSize;

    // obtain pageSize for the first time
#if defined(_WIN32)
    SYSTEM_INFO sysInfo;
    GetSystemInfo(&sysInfo);
    pageSize = sysInfo.dwPageSize;
#else
    pageSize = sysconf(_SC_PAGESIZE);
#endif

    // rigorously check the found pagesize is valid
    // and consistent with preconditions assumed by
    // callers, to avoid extremely funky bugs on
    // esoteric future systems

    if (pageSize <= 0)
        error_gettingPageSizeFailed();

    if (!isPowerOf2(pageSize))
        error_pageSizeNotAPowerOf2();

    if (pageSize % sizeof(qcomp) != 0)
        error_pageSizeNotAMultipleOfQcomp();

    return pageSize;
}


qcomp* cpu_allocArray(qindex length) {