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SafeArrayUnlock function (oleauto.h)

  • Article

Decrements the lock count of an array so it can be freed or resized.

Syntax

HRESULT SafeArrayUnlock(
  [in] SAFEARRAY *psa
);

Parameters

[in] psa

An array descriptor created by SafeArrayCreate.

Return value

This function can return one of these values.

Return code Description
S_OK
 Success.
E_INVALIDARG
 The argument psa is not valid.
E_UNEXPECTED
 The array could not be unlocked.

Remarks

This function is called after access to the data in an array is finished.

Thread Safety

All public static members of the SAFEARRAY data type are thread safe. Instance members are not guaranteed to be thread safe.

For example, consider an application that uses the SafeArrayLock and SafeArrayUnlock functions. If these functions are called concurrently from different threads on the same SAFEARRAY data type instance, an inconsistent lock count may be created. This will eventually cause the SafeArrayUnlock function to return E_UNEXPECTED. You can prevent this by providing your own synchronization code.

Requirements

Requirement Value
Target Platform Windows
Header oleauto.h
Library OleAut32.lib
DLL OleAut32.dll