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338aefcb38
Modify plugins.m4 configuration framework so that plugins which are not built still get added to the source distribution during make dist. This came up now because we can only build ibmdb2i on i5/OS, and we can't bootstrap our source dist on that platform. The solution is to specify DIST_SUBDIRS containing all plugins, separate from SUBDIRS which contains the plugins which are actually built. This ibmdb2i code is from the ibmdb2i-ga3-src.zip file, with a patch to plug.in to disable the plugin if the PASE environment isn't available.
107 lines
3.7 KiB
C++
107 lines
3.7 KiB
C++
/*
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Licensed Materials - Property of IBM
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DB2 Storage Engine Enablement
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Copyright IBM Corporation 2007,2008
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All rights reserved
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Redistribution and use in source and binary forms, with or without modification,
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are permitted provided that the following conditions are met:
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(a) Redistributions of source code must retain this list of conditions, the
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copyright notice in section {d} below, and the disclaimer following this
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list of conditions.
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(b) Redistributions in binary form must reproduce this list of conditions, the
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copyright notice in section (d) below, and the disclaimer following this
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list of conditions, in the documentation and/or other materials provided
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with the distribution.
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(c) The name of IBM may not be used to endorse or promote products derived from
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this software without specific prior written permission.
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(d) The text of the required copyright notice is:
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Licensed Materials - Property of IBM
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DB2 Storage Engine Enablement
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Copyright IBM Corporation 2007,2008
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All rights reserved
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THIS SOFTWARE IS PROVIDED BY IBM CORPORATION "AS IS" AND ANY EXPRESS OR IMPLIED
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WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
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SHALL IBM CORPORATION BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
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OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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CONTRACT, STRICT LIABILITY, OR TORT INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
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OF SUCH DAMAGE.
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*/
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#include "db2i_blobCollection.h"
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/**
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Return the size to use when allocating space for blob reads.
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@param fieldIndex The field to allocate for
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@param[out] shouldProtect Indicates whether storage protection should be
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applied to the space, because the size returned is
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smaller than the maximum possible size.
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*/
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uint32
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BlobCollection::getSizeToAllocate(int fieldIndex, bool& shouldProtect)
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{
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Field* field = table->getMySQLTable()->field[fieldIndex];
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uint fieldLength = field->max_display_length();
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if (fieldLength <= MAX_FULL_ALLOCATE_BLOB_LENGTH)
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{
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shouldProtect = false;
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return fieldLength;
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}
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shouldProtect = true;
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uint curMaxSize = table->getBlobFieldActualSize(fieldIndex);
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uint defaultAllocSize = min(defaultAllocation, fieldLength);
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return max(defaultAllocSize, curMaxSize);
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}
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void
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BlobCollection::generateBuffer(int fieldIndex)
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{
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DBUG_ASSERT(table->db2Field(fieldIndex).isBlob());
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bool protect;
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buffers[table->getBlobIdFromField(fieldIndex)].Malloc(getSizeToAllocate(fieldIndex, protect), protect);
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return;
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}
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/**
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Realloc the read buffer associated with a blob field.
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This is used when the previous allocation for a blob field is found to be
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too small (this is discovered when QMY_READ trips over the protected boundary
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page).
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@param fieldIndex The field to be reallocated
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@param size The size of buffer to allocate for this field.
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*/
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ValidatedPointer<char>&
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BlobCollection::reallocBuffer(int fieldIndex, size_t size)
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{
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ProtectedBuffer& buf = buffers[table->getBlobIdFromField(fieldIndex)];
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if (size <= buf.allocLen())
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return buf.ptr();
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table->updateBlobFieldActualSize(fieldIndex, size);
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DBUG_PRINT("BlobCollection::reallocBuffer",("PERF: reallocing %d to %d: ", fieldIndex, size));
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bool protect;
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buf.Free();
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buf.Malloc(getSizeToAllocate(fieldIndex, protect), protect);
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return buf.ptr();
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}
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