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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 19:33:14 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 19:33:14 +0000 |
commit | 36d22d82aa202bb199967e9512281e9a53db42c9 (patch) | |
tree | 105e8c98ddea1c1e4784a60a5a6410fa416be2de /storage/mozStorageBindingParams.h | |
parent | Initial commit. (diff) | |
download | firefox-esr-36d22d82aa202bb199967e9512281e9a53db42c9.tar.xz firefox-esr-36d22d82aa202bb199967e9512281e9a53db42c9.zip |
Adding upstream version 115.7.0esr.upstream/115.7.0esrupstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'storage/mozStorageBindingParams.h')
-rw-r--r-- | storage/mozStorageBindingParams.h | 111 |
1 files changed, 111 insertions, 0 deletions
diff --git a/storage/mozStorageBindingParams.h b/storage/mozStorageBindingParams.h new file mode 100644 index 0000000000..cef221ecef --- /dev/null +++ b/storage/mozStorageBindingParams.h @@ -0,0 +1,111 @@ +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- + * vim: sw=2 ts=2 et lcs=trail\:.,tab\:>~ : + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +#ifndef mozStorageBindingParams_h +#define mozStorageBindingParams_h + +#include "nsCOMArray.h" +#include "nsIVariant.h" +#include "nsInterfaceHashtable.h" + +#include "mozStorageBindingParamsArray.h" +#include "mozStorageStatement.h" +#include "mozStorageAsyncStatement.h" +#include "Variant.h" + +#include "mozIStorageBindingParams.h" +#include "IStorageBindingParamsInternal.h" + +namespace mozilla { +namespace storage { + +class BindingParams : public mozIStorageBindingParams, + public IStorageBindingParamsInternal { + public: + NS_DECL_THREADSAFE_ISUPPORTS + NS_DECL_MOZISTORAGEBINDINGPARAMS + NS_DECL_ISTORAGEBINDINGPARAMSINTERNAL + + /** + * Locks the parameters and prevents further modification to it (such as + * binding more elements to it). + */ + void lock(); + + /** + * Unlocks the parameters and allows modification to it again. + * + * @param aOwningStatement + * The statement that owns us. We cleared this when we were locked, + * and our invariant requires us to have this, so you need to tell us + * again. + */ + void unlock(Statement* aOwningStatement); + + /** + * @returns the pointer to the owning BindingParamsArray. Used by a + * BindingParamsArray to verify that we belong to it when added. + */ + const mozIStorageBindingParamsArray* getOwner() const; + + BindingParams(mozIStorageBindingParamsArray* aOwningArray, + Statement* aOwningStatement); + + protected: + virtual ~BindingParams() {} + + explicit BindingParams(mozIStorageBindingParamsArray* aOwningArray); + // Note that this is managed as a sparse array, so particular caution should + // be used for out-of-bounds usage. + nsTArray<RefPtr<Variant_base> > mParameters; + bool mLocked; + + private: + /** + * Track the BindingParamsArray that created us until we are added to it. + * (Once we are added we are locked and no one needs to look up our owner.) + * Ref-counted since there is no invariant that guarantees it stays alive + * otherwise. This keeps mOwningStatement alive for us too since the array + * also holds a reference. + */ + nsCOMPtr<mozIStorageBindingParamsArray> mOwningArray; + /** + * Used in the synchronous binding case to map parameter names to indices. + * Not reference-counted because this is only non-null as long as mOwningArray + * is non-null and mOwningArray also holds a statement reference. + */ + Statement* mOwningStatement; + uint32_t mParamCount; +}; + +/** + * Adds late resolution of named parameters so they don't get resolved until we + * try and bind the parameters on the async thread. We also stop checking + * parameter indices for being too big since we just just don't know how many + * there are. + * + * We support *either* binding by name or binding by index. Trying to do both + * results in only binding by name at sqlite3_stmt bind time. + */ +class AsyncBindingParams : public BindingParams { + public: + NS_IMETHOD BindByName(const nsACString& aName, nsIVariant* aValue) override; + NS_IMETHOD BindByIndex(uint32_t aIndex, nsIVariant* aValue) override; + + virtual already_AddRefed<mozIStorageError> bind( + sqlite3_stmt* aStatement) override; + + explicit AsyncBindingParams(mozIStorageBindingParamsArray* aOwningArray); + virtual ~AsyncBindingParams() {} + + private: + nsInterfaceHashtable<nsCStringHashKey, nsIVariant> mNamedParameters; +}; + +} // namespace storage +} // namespace mozilla + +#endif // mozStorageBindingParams_h |