Method validateFields

src/com/sun/jna/Structure.java:1305–1329

ensure all fields are of valid type.

()

    /** ensure all fields are of valid type. */
    private void validateFields() {
        // Try to read the value under the read lock
        cacheStructureLock.readLock().lock();
        try {
            if (validationMap.containsKey(getClass())) {
                return; // Return because this Structure has already been validated
            }
        } finally {
            cacheStructureLock.readLock().unlock();
        }

        // If not found, perform validation and update the cache under the write lock
        cacheStructureLock.writeLock().lock();
        try {
            // Double-check if another thread has computed the value before we do (see JavaDoc)
            validationMap.computeIfAbsent(getClass(), (cls) -> {
                for (Field f : getFieldList()) {
                    validateField(f.getName(), f.getType());
                }
                return true;
            });
        } finally {
            cacheStructureLock.writeLock().unlock();
        }
    }

    /** Calculates the size, alignment, and field layout of this structure.
        Also initializes any null-valued Structure or NativeMapped