Coverage Summary for Class: GhostPool (com.ghost.serialization)

 package com.ghost.serialization
 
 import com.ghost.serialization.parser.GhostJsonConstants.SCRATCH_BUFFER_SIZE
 
 private const val TIER_SMALL = 1024
 private const val TIER_MEDIUM = 16384
 private const val TIER_LARGE = 65536
 private const val TIER_XLARGE = 524288
 private const val TIER_XXLARGE = 4194304
 
 internal class GhostPool {
     var scratch: ByteArray? = null
     var small: ByteArray? = null
     var medium: ByteArray? = null
     var large: ByteArray? = null
     var xlarge: ByteArray? = null
     var xxlarge: ByteArray? = null
 }
 
 internal expect fun getLocalPool(): GhostPool
 
 @PublishedApi
 internal val SCRATCH_BUFFER_SIZE_INT = SCRATCH_BUFFER_SIZE
 
 /**
  * Provides access to reusable buffers to minimize allocations during hot paths.
  * Tiered strategy handles small, medium, and large payloads efficiently.
  */
 @InternalGhostApi
 fun acquireScratchBuffer(minSize: Int = 48): ByteArray {
     val pool = getLocalPool()
     return when {
         minSize <= SCRATCH_BUFFER_SIZE_INT -> {
             val scratchLocal = pool.scratch
             if (scratchLocal != null && scratchLocal.size >= minSize) {
                 pool.scratch = null
                 scratchLocal
             } else {
                 ByteArray(SCRATCH_BUFFER_SIZE_INT)
             }
         }
 
         minSize <= TIER_SMALL -> {
             val smallLocal = pool.small
             if (smallLocal != null && smallLocal.size >= minSize) {
                 pool.small = null
                 smallLocal
             } else {
                 ByteArray(TIER_SMALL)
             }
         }
 
         minSize <= TIER_MEDIUM -> {
             val mediumLocal = pool.medium
             if (mediumLocal != null && mediumLocal.size >= minSize) {
                 pool.medium = null
                 mediumLocal
             } else {
                 ByteArray(TIER_MEDIUM)
             }
         }
 
         minSize <= TIER_LARGE -> {
             val largeLocal = pool.large
             if (largeLocal != null && largeLocal.size >= minSize) {
                 pool.large = null
                 largeLocal
             } else {
                 ByteArray(TIER_LARGE)
             }
         }
 
         minSize <= TIER_XLARGE -> {
             val xlargeLocal = pool.xlarge
             if (xlargeLocal != null && xlargeLocal.size >= minSize) {
                 pool.xlarge = null
                 xlargeLocal
             } else {
                 ByteArray(TIER_XLARGE)
             }
         }
 
         minSize <= TIER_XXLARGE -> {
             val xxlargeLocal = pool.xxlarge
             if (xxlargeLocal != null && xxlargeLocal.size >= minSize) {
                 pool.xxlarge = null
                 xxlargeLocal
             } else {
                 ByteArray(TIER_XXLARGE)
             }
         }
 
         else -> ByteArray(minSize)
     }
 }
 
 /**
  * Releases a buffer back to the pool.
  */
 @InternalGhostApi
 fun releaseScratchBuffer(buffer: ByteArray) {
     val pool = getLocalPool()
     val size = buffer.size
     when (size) {
         SCRATCH_BUFFER_SIZE -> pool.scratch = buffer
         TIER_SMALL -> pool.small = buffer
         TIER_MEDIUM -> pool.medium = buffer
         TIER_LARGE -> pool.large = buffer
         TIER_XLARGE -> pool.xlarge = buffer
         TIER_XXLARGE -> pool.xxlarge = buffer
     }
 }