tests/unit/test_pool.cpp

/*
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 *     derived from this software without specific prior written permission.
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 */

#include "test_platform.h"

#include <openthread/config.h>

#include "common/pool.hpp"
#include "instance/instance.hpp"

#include "test_util.h"

namespace ot {

struct EntryBase
{
    EntryBase *mNext;
};

struct Entry : public EntryBase, LinkedListEntry<Entry>
{
public:
    Entry(void)
        : mInitWithInstance(false)
    {
    }

    void Init(Instance &) { mInitWithInstance = true; }

    bool IsInitializedWithInstance(void) const { return mInitWithInstance; }

private:
    bool mInitWithInstance;
};

enum : uint16_t
{
    kPoolSize = 11,
};

typedef Pool<Entry, kPoolSize> EntryPool;

static Entry sNonPoolEntry;

void VerifyEntry(EntryPool &aPool, const Entry &aEntry, bool aInitWithInstance)
{
    uint16_t         index;
    const EntryPool &constPool = const_cast<const EntryPool &>(aPool);

    VerifyOrQuit(aPool.IsPoolEntry(aEntry));
    VerifyOrQuit(!aPool.IsPoolEntry(sNonPoolEntry), "Pool::IsPoolEntry() succeeded for non-pool entry");

    index = aPool.GetIndexOf(aEntry);
    VerifyOrQuit(&aPool.GetEntryAt(index) == &aEntry);
    VerifyOrQuit(&constPool.GetEntryAt(index) == &aEntry);

    VerifyOrQuit(aEntry.IsInitializedWithInstance() == aInitWithInstance, "Pool did not correctly Init() entry");
}

void TestPool(EntryPool &aPool, bool aInitWithInstance)
{
    Entry *entries[kPoolSize];

    VerifyOrQuit(aPool.GetSize() == kPoolSize);

    for (Entry *&entry : entries)
    {
        entry = aPool.Allocate();
        VerifyOrQuit(entry != nullptr, "Pool::Allocate() failed");

        VerifyEntry(aPool, *entry, aInitWithInstance);
    }

    for (uint16_t numEntriesToFree = 1; numEntriesToFree <= kPoolSize; numEntriesToFree++)
    {
        VerifyOrQuit(aPool.Allocate() == nullptr, "Pool::Allocate() did not fail when all pool entries were allocated");

        for (uint16_t i = 0; i < numEntriesToFree; i++)
        {
            VerifyEntry(aPool, *entries[i], aInitWithInstance);
            aPool.Free(*entries[i]);
        }

        for (uint16_t i = 0; i < numEntriesToFree; i++)
        {
            entries[i] = aPool.Allocate();
            VerifyOrQuit(entries[i] != nullptr, "Pool::Allocate() failed");

            VerifyEntry(aPool, *entries[i], aInitWithInstance);
        }
    }

    VerifyOrQuit(aPool.Allocate() == nullptr, "Pool::Allocate() did not fail when all pool entries were allocated");
}

void TestPool(void)
{
    Instance *instance = testInitInstance();
    EntryPool pool1;
    EntryPool pool2(*instance);

    TestPool(pool1, /* aInitWithInstance */ false);
    TestPool(pool2, /* aInitWithInstance */ true);

    testFreeInstance(instance);
}

} // namespace ot

int main(void)
{
    ot::TestPool();
    printf("All tests passed\n");
    return 0;
}