94 lines
2.5 KiB
Java
94 lines
2.5 KiB
Java
package androidx.core.util;
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import androidx.annotation.NonNull;
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import androidx.annotation.Nullable;
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public final class Pools {
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public interface Pool<T> {
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@Nullable
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T acquire();
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boolean release(@NonNull T t);
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}
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public static class SimplePool<T> implements Pool<T> {
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private final Object[] mPool;
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private int mPoolSize;
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public SimplePool(int i) {
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if (i > 0) {
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this.mPool = new Object[i];
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return;
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}
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throw new IllegalArgumentException("The max pool size must be > 0");
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}
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private boolean isInPool(@NonNull T t) {
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for (int i = 0; i < this.mPoolSize; i++) {
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if (this.mPool[i] == t) {
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return true;
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}
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}
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return false;
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}
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@Override // androidx.core.util.Pools.Pool
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public T acquire() {
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int i = this.mPoolSize;
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if (i <= 0) {
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return null;
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}
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int i2 = i - 1;
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Object[] objArr = this.mPool;
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T t = (T) objArr[i2];
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objArr[i2] = null;
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this.mPoolSize = i - 1;
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return t;
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}
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@Override // androidx.core.util.Pools.Pool
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public boolean release(@NonNull T t) {
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if (!isInPool(t)) {
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int i = this.mPoolSize;
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Object[] objArr = this.mPool;
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if (i >= objArr.length) {
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return false;
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}
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objArr[i] = t;
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this.mPoolSize = i + 1;
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return true;
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}
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throw new IllegalStateException("Already in the pool!");
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}
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}
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public static class SynchronizedPool<T> extends SimplePool<T> {
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private final Object mLock = new Object();
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public SynchronizedPool(int i) {
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super(i);
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}
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@Override // androidx.core.util.Pools.SimplePool, androidx.core.util.Pools.Pool
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public T acquire() {
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T t;
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synchronized (this.mLock) {
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t = (T) super.acquire();
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}
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return t;
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}
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@Override // androidx.core.util.Pools.SimplePool, androidx.core.util.Pools.Pool
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public boolean release(@NonNull T t) {
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boolean release;
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synchronized (this.mLock) {
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release = super.release(t);
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}
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return release;
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}
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}
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private Pools() {
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}
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}
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