storage/src/mozStorageBindingParamsArray.cpp

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  23  * Contributor(s):
  24  *   Shawn Wilsher <me@shawnwilsher.com> (Original Author)
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  39
  40 #include "mozStorageBindingParamsArray.h"
  41 #include "mozStorageBindingParams.h"
  42 #include "StorageBaseStatementInternal.h"
  43
  44 namespace mozilla {
  45 namespace storage {
  46
  47 ////////////////////////////////////////////////////////////////////////////////
  48 //// BindingParamsArray
  49
  50 BindingParamsArray::BindingParamsArray(
  51   StorageBaseStatementInternal *aOwningStatement
  52 )
  53 : mOwningStatement(aOwningStatement)
  54 , mLocked(false)
  55 {
  56 }
  57
  58 void
  59 BindingParamsArray::lock()
  60 {
  61   NS_ASSERTION(mLocked == false, "Array has already been locked!");
  62   mLocked = true;
  63
  64   // We also no longer need to hold a reference to our statement since it owns
  65   // us.
  66   mOwningStatement = nsnull;
  67 }
  68
  69 const StorageBaseStatementInternal *
  70 BindingParamsArray::getOwner() const
  71 {
  72   return mOwningStatement;
  73 }
  74
  75 NS_IMPL_THREADSAFE_ISUPPORTS1(
  76   BindingParamsArray,
  77   mozIStorageBindingParamsArray
  78 )
  79
  80 ///////////////////////////////////////////////////////////////////////////////
  81 //// mozIStorageBindingParamsArray
  82
  83 NS_IMETHODIMP
  84 BindingParamsArray::NewBindingParams(mozIStorageBindingParams **_params)
  85 {
  86   NS_ENSURE_FALSE(mLocked, NS_ERROR_UNEXPECTED);
  87
  88   nsCOMPtr<mozIStorageBindingParams> params(
  89     mOwningStatement->newBindingParams(this));
  90   NS_ENSURE_TRUE(params, NS_ERROR_UNEXPECTED);
  91
  92   params.forget(_params);
  93   return NS_OK;
  94 }
  95
  96 NS_IMETHODIMP
  97 BindingParamsArray::AddParams(mozIStorageBindingParams *aParameters)
  98 {
  99   NS_ENSURE_FALSE(mLocked, NS_ERROR_UNEXPECTED);
 100
 101   BindingParams *params = static_cast<BindingParams *>(aParameters);
 102
 103   // Check to make sure that this set of parameters was created with us.
 104   if (params->getOwner() != this)
 105     return NS_ERROR_UNEXPECTED;
 106
 107   NS_ENSURE_TRUE(mArray.AppendElement(params), NS_ERROR_OUT_OF_MEMORY);
 108
 109   // Lock the parameters only after we've successfully added them.
 110   params->lock();
 111
 112   return NS_OK;
 113 }
 114
 115 NS_IMETHODIMP
 116 BindingParamsArray::GetLength(PRUint32 *_length)
 117 {
 118   *_length = length();
 119   return NS_OK;
 120 }
 121
 122 } // namespace storage
 123 } // namespace mozilla