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Remove dashes in comments that don't need them, rewrap with pgindent.

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This commit is contained in:
Bruce Momjian
2001-03-22 06:16:21 +00:00
parent 9e1552607a
commit 0686d49da0
100 changed files with 4522 additions and 6023 deletions
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134
src/backend/access/transam/transsup.c
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@@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/access/transam/Attic/transsup.c,v 1.29 2001/03/22 03:59:17 momjian Exp $
* $Header: /cvsroot/pgsql/src/backend/access/transam/Attic/transsup.c,v 1.30 2001/03/22 06:16:10 momjian Exp $
*
* NOTES
* This file contains support functions for the high
@@ -56,11 +56,9 @@ TransComputeBlockNumber(Relation relation, /* relation to test */
{
long itemsPerBlock = 0;
/* ----------------
* we calculate the block number of our transaction
* by dividing the transaction id by the number of
* transaction things per block.
* ----------------
/*
* we calculate the block number of our transaction by dividing the
* transaction id by the number of transaction things per block.
*/
if (relation == LogRelation)
itemsPerBlock = TP_NumXidStatusPerBlock;
@@ -109,18 +107,16 @@ TransBlockGetLastTransactionIdStatus(Block tblock,
BitIndex offset;
XidStatus xstatus;
/* ----------------
* sanity check
* ----------------
/*
* sanity check
*/
Assert((tblock != NULL));
/* ----------------
* search downward from the top of the block data, looking
* for the first Non-in progress transaction status. Since we
* are scanning backward, this will be last recorded transaction
* status on the block.
* ----------------
/*
* search downward from the top of the block data, looking for the
* first Non-in progress transaction status. Since we are scanning
* backward, this will be last recorded transaction status on the
* block.
*/
maxIndex = TP_NumXidStatusPerBlock;
for (index = maxIndex; index > 0; index--)
@@ -131,11 +127,10 @@ TransBlockGetLastTransactionIdStatus(Block tblock,
xstatus = (bit1 | bit2);
/* ----------------
* here we have the status of some transaction, so test
* if the status is recorded as "in progress". If so, then
* we save the transaction id in the place specified by the caller.
* ----------------
/*
* here we have the status of some transaction, so test if the
* status is recorded as "in progress". If so, then we save the
* transaction id in the place specified by the caller.
*/
if (xstatus != XID_INPROGRESS)
{
@@ -148,12 +143,11 @@ TransBlockGetLastTransactionIdStatus(Block tblock,
}
}
/* ----------------
* if we get here and index is 0 it means we couldn't find
* a non-inprogress transaction on the block. For now we just
* return this info to the user. They can check if the return
* status is "in progress" to know this condition has arisen.
* ----------------
/*
* if we get here and index is 0 it means we couldn't find a
* non-inprogress transaction on the block. For now we just return
* this info to the user. They can check if the return status is "in
* progress" to know this condition has arisen.
*/
if (index == 0)
{
@@ -161,9 +155,8 @@ TransBlockGetLastTransactionIdStatus(Block tblock,
TransactionIdStore(baseXid, returnXidP);
}
/* ----------------
* return the status to the user
* ----------------
/*
* return the status to the user
*/
return xstatus;
}
@@ -200,17 +193,15 @@ TransBlockGetXidStatus(Block tblock,
*/
index = transactionId % TP_NumXidStatusPerBlock;
/* ----------------
* get the data at the specified index
* ----------------
/*
* get the data at the specified index
*/
offset = BitIndexOf(index);
bit1 = ((bits8) BitArrayBitIsSet((BitArray) tblock, offset++)) << 1;
bit2 = (bits8) BitArrayBitIsSet((BitArray) tblock, offset);
/* ----------------
* return the transaction status to the caller
* ----------------
/*
* return the transaction status to the caller
*/
return (XidStatus) (bit1 | bit2);
}
@@ -245,9 +236,8 @@ TransBlockSetXidStatus(Block tblock,
offset = BitIndexOf(index);
/* ----------------
* store the transaction value at the specified offset
* ----------------
/*
* store the transaction value at the specified offset
*/
switch (xstatus)
{
@@ -291,18 +281,16 @@ TransBlockNumberGetXidStatus(Relation relation,
XidStatus xstatus; /* recorded status of xid */
bool localfail; /* bool used if failP = NULL */
/* ----------------
* get the page containing the transaction information
* ----------------
/*
* get the page containing the transaction information
*/
buffer = ReadBuffer(relation, blockNumber);
LockBuffer(buffer, BUFFER_LOCK_SHARE);
block = BufferGetBlock(buffer);
/* ----------------
* get the status from the block. note, for now we always
* return false in failP.
* ----------------
/*
* get the status from the block. note, for now we always return
* false in failP.
*/
if (failP == NULL)
failP = &localfail;
@@ -310,9 +298,8 @@ TransBlockNumberGetXidStatus(Relation relation,
xstatus = TransBlockGetXidStatus(block, xid);
/* ----------------
* release the buffer and return the status
* ----------------
/*
* release the buffer and return the status
*/
LockBuffer(buffer, BUFFER_LOCK_UNLOCK);
ReleaseBuffer(buffer);
@@ -335,19 +322,17 @@ TransBlockNumberSetXidStatus(Relation relation,
Block block; /* block containing xstatus */
bool localfail; /* bool used if failP = NULL */
/* ----------------
* get the block containing the transaction status
* ----------------
/*
* get the block containing the transaction status
*/
buffer = ReadBuffer(relation, blockNumber);
LockBuffer(buffer, BUFFER_LOCK_EXCLUSIVE);
block = BufferGetBlock(buffer);
/* ----------------
* attempt to update the status of the transaction on the block.
* if we are successful, write the block. otherwise release the buffer.
* note, for now we always return false in failP.
* ----------------
/*
* attempt to update the status of the transaction on the block. if we
* are successful, write the block. otherwise release the buffer.
* note, for now we always return false in failP.
*/
if (failP == NULL)
failP = &localfail;
@@ -381,22 +366,20 @@ TransGetLastRecordedTransaction(Relation relation,
(*failP) = false;
/* ----------------
* SOMEDAY gain exclusive access to the log relation
/*
* SOMEDAY gain exclusive access to the log relation
*
* That someday is today 5 Aug. 1991 -mer
* It looks to me like we only need to set a read lock here, despite
* the above comment about exclusive access. The block is never
* actually written into, we only check status bits.
* ----------------
* That someday is today 5 Aug. 1991 -mer It looks to me like we only
* need to set a read lock here, despite the above comment about
* exclusive access. The block is never actually written into, we
* only check status bits.
*/
RelationSetLockForRead(relation);
/* ----------------
* we assume the last block of the log contains the last
* recorded transaction. If the relation is empty we return
* failure to the user.
* ----------------
/*
* we assume the last block of the log contains the last recorded
* transaction. If the relation is empty we return failure to the
* user.
*/
n = RelationGetNumberOfBlocks(relation);
if (n == 0)
@@ -405,17 +388,15 @@ TransGetLastRecordedTransaction(Relation relation,
return;
}
/* ----------------
* get the block containing the transaction information
* ----------------
/*
* get the block containing the transaction information
*/
blockNumber = n - 1;
buffer = ReadBuffer(relation, blockNumber);
block = BufferGetBlock(buffer);
/* ----------------
* get the last xid on the block
* ----------------
/*
* get the last xid on the block
*/
baseXid = blockNumber * TP_NumXidStatusPerBlock;
@@ -424,9 +405,8 @@ TransGetLastRecordedTransaction(Relation relation,
ReleaseBuffer(buffer);
/* ----------------
* SOMEDAY release our lock on the log relation
* ----------------
/*
* SOMEDAY release our lock on the log relation
*/
RelationUnsetLockForRead(relation);
}