mirror of
https://github.com/tursodatabase/libsql.git
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634 lines
18 KiB
C
634 lines
18 KiB
C
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/*
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** This file is broken into three semi-autonomous parts:
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**
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** 1. The database functions.
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** 2. The thread wrappers.
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** 3. The implementation of the mt1.* tests.
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*/
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/*************************************************************************
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** DATABASE CONTENTS:
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**
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** The database contains up to N key/value pairs, where N is some large
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** number (say 10,000,000). Keys are integer values between 0 and (N-1).
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** The value associated with each key is a pseudo-random blob of data.
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**
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** Key/value pair keys are encoded as the two bytes "k." followed by a
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** 10-digit decimal number. i.e. key 45 -> "k.0000000045".
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**
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** As well as the key/value pairs, the database also contains checksum
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** entries. The checksums form a hierarchy - for every F key/value
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** entries there is one level 1 checksum. And for each F level 1 checksums
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** there is one level 2 checksum. And so on.
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**
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** Checksum keys are encoded as the two byte "c." followed by the
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** checksum level, followed by a 10 digit decimal number containing
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** the value of the first key that contributes to the checksum value.
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** For example, assuming F==10, the level 1 checksum that spans keys
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** 10 to 19 is "c.1.0000000010".
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**
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** Clients may perform one of two operations on the database: a read
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** or a write.
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**
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** READ OPERATIONS:
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**
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** A read operation scans a range of F key/value pairs. It computes
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** the expected checksum and then compares the computed value to the
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** actual value stored in the level 1 checksum entry. It then scans
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** the group of F level 1 checksums, and compares the computed checksum
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** to the associated level 2 checksum value, and so on until the
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** highest level checksum value has been verified.
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**
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** If a checksum ever fails to match the expected value, the test
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** has failed.
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**
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** WRITE OPERATIONS:
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**
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** A write operation involves writing (possibly clobbering) a single
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** key/value pair. The associated level 1 checksum is then recalculated
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** updated. Then the level 2 checksum, and so on until the highest
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** level checksum has been modified.
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**
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** All updates occur inside a single transaction.
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**
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** INTERFACE:
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**
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** The interface used by test cases to read and write the db consists
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** of type DbParameters and the following functions:
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**
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** dbReadOperation()
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** dbWriteOperation()
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*/
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#include "lsmtest.h"
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typedef struct DbParameters DbParameters;
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struct DbParameters {
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int nFanout; /* Checksum fanout (F) */
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int nKey; /* Size of key space (N) */
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};
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#define DB_KEY_BYTES (2+5+10+1)
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/*
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** Argument aBuf[] must point to a buffer at least DB_KEY_BYTES in size.
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** This function populates the buffer with a nul-terminated key string
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** corresponding to key iKey.
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*/
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static void dbFormatKey(
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DbParameters *pParam,
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int iLevel,
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int iKey, /* Key value */
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char *aBuf /* Write key string here */
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){
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if( iLevel==0 ){
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snprintf(aBuf, DB_KEY_BYTES, "k.%.10d", iKey);
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}else{
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int f = 1;
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int i;
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for(i=0; i<iLevel; i++) f = f * pParam->nFanout;
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snprintf(aBuf, DB_KEY_BYTES, "c.%d.%.10d", iLevel, f*(iKey/f));
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}
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}
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/*
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** Argument aBuf[] must point to a buffer at least DB_KEY_BYTES in size.
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** This function populates the buffer with the string representation of
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** checksum value iVal.
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*/
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static void dbFormatCksumValue(u32 iVal, char *aBuf){
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snprintf(aBuf, DB_KEY_BYTES, "%.10u", iVal);
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}
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/*
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** Return the highest level of checksum in the database described
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** by *pParam.
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*/
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static int dbMaxLevel(DbParameters *pParam){
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int iMax;
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int n = 1;
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for(iMax=0; n<pParam->nKey; iMax++){
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n = n * pParam->nFanout;
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}
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return iMax;
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}
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static void dbCksum(
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void *pCtx, /* IN/OUT: Pointer to u32 containing cksum */
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void *pKey, int nKey, /* Database key. Unused. */
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void *pVal, int nVal /* Database value. Checksum this. */
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){
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u8 *aVal = (u8 *)pVal;
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u32 *pCksum = (u32 *)pCtx;
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u32 cksum = *pCksum;
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int i;
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unused_parameter(pKey);
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unused_parameter(nKey);
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for(i=0; i<nVal; i++){
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cksum += (cksum<<3) + (int)aVal[i];
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}
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*pCksum = cksum;
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}
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/*
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** Compute the value of the checksum stored on level iLevel that contains
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** data from key iKey by scanning the pParam->nFanout entries at level
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** iLevel-1.
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*/
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static u32 dbComputeCksum(
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DbParameters *pParam, /* Database parameters */
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TestDb *pDb, /* Database connection handle */
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int iLevel, /* Level of checksum to compute */
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int iKey, /* Compute checksum for this key */
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int *pRc /* IN/OUT: Error code */
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){
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u32 cksum = 0;
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if( *pRc==0 ){
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int nFirst;
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int nLast;
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int iFirst = 0;
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int iLast = 0;
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int i;
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int f = 1;
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char zFirst[DB_KEY_BYTES];
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char zLast[DB_KEY_BYTES];
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assert( iLevel>=1 );
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for(i=0; i<iLevel; i++) f = f * pParam->nFanout;
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iFirst = f*(iKey/f);
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iLast = iFirst + f - 1;
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dbFormatKey(pParam, iLevel-1, iFirst, zFirst);
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dbFormatKey(pParam, iLevel-1, iLast, zLast);
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nFirst = strlen(zFirst);
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nLast = strlen(zLast);
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*pRc = tdb_scan(pDb, (u32*)&cksum, 0, zFirst, nFirst, zLast, nLast,dbCksum);
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}
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return cksum;
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}
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static void dbReadOperation(
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DbParameters *pParam, /* Database parameters */
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TestDb *pDb, /* Database connection handle */
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void (*xDelay)(void *),
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void *pDelayCtx,
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int iKey, /* Key to read */
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int *pRc /* IN/OUT: Error code */
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){
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const int iMax = dbMaxLevel(pParam);
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int i;
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if( tdb_transaction_support(pDb) ) testBegin(pDb, 1, pRc);
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for(i=1; *pRc==0 && i<=iMax; i++){
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char zCksum[DB_KEY_BYTES];
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char zKey[DB_KEY_BYTES];
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u32 iCksum = 0;
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iCksum = dbComputeCksum(pParam, pDb, i, iKey, pRc);
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if( iCksum ){
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if( xDelay && i==1 ) xDelay(pDelayCtx);
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dbFormatCksumValue(iCksum, zCksum);
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dbFormatKey(pParam, i, iKey, zKey);
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testFetchStr(pDb, zKey, zCksum, pRc);
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}
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}
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if( tdb_transaction_support(pDb) ) testCommit(pDb, 0, pRc);
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}
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static int dbWriteOperation(
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DbParameters *pParam, /* Database parameters */
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TestDb *pDb, /* Database connection handle */
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int iKey, /* Key to write to */
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const char *zValue, /* Nul-terminated value to write */
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int *pRc /* IN/OUT: Error code */
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){
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const int iMax = dbMaxLevel(pParam);
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char zKey[DB_KEY_BYTES];
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int i;
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int rc;
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assert( iKey>=0 && iKey<pParam->nKey );
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dbFormatKey(pParam, 0, iKey, zKey);
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/* Open a write transaction. This may fail - SQLITE4_BUSY */
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if( *pRc==0 && tdb_transaction_support(pDb) ){
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rc = tdb_begin(pDb, 2);
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if( rc==5 ) return 0;
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*pRc = rc;
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}
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testWriteStr(pDb, zKey, zValue, pRc);
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for(i=1; i<=iMax; i++){
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char zCksum[DB_KEY_BYTES];
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u32 iCksum = 0;
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iCksum = dbComputeCksum(pParam, pDb, i, iKey, pRc);
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dbFormatCksumValue(iCksum, zCksum);
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dbFormatKey(pParam, i, iKey, zKey);
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testWriteStr(pDb, zKey, zCksum, pRc);
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}
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if( tdb_transaction_support(pDb) ) testCommit(pDb, 0, pRc);
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return 1;
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}
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/*************************************************************************
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** The following block contains testXXX() functions that implement a
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** wrapper around the systems native multi-thread support. There are no
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** synchronization primitives - just functions to launch and join
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** threads. Wrapper functions are:
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**
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** testThreadSupport()
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**
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** testThreadInit()
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** testThreadShutdown()
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** testThreadLaunch()
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** testThreadWait()
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**
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** testThreadSetHalt()
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** testThreadGetHalt()
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** testThreadSetResult()
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** testThreadGetResult()
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**
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** testThreadEnterMutex()
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** testThreadLeaveMutex()
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*/
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typedef struct ThreadSet ThreadSet;
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#ifdef LSM_MUTEX_PTHREADS
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#include <pthread.h>
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#include <unistd.h>
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typedef struct Thread Thread;
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struct Thread {
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int rc;
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char *zMsg;
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pthread_t id;
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void (*xMain)(ThreadSet *, int, void *);
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void *pCtx;
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ThreadSet *pThreadSet;
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};
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struct ThreadSet {
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int bHalt; /* Halt flag */
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int nThread; /* Number of threads */
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Thread *aThread; /* Array of Thread structures */
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pthread_mutex_t mutex; /* Mutex used for cheating */
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};
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/*
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** Return true if this build supports threads, or false otherwise. If
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** this function returns false, no other testThreadXXX() functions should
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** be called.
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*/
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static int testThreadSupport(){ return 1; }
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/*
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** Allocate and return a thread-set handle with enough space allocated
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** to handle up to nMax threads. Each call to this function should be
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** matched by a call to testThreadShutdown() to delete the object.
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*/
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static ThreadSet *testThreadInit(int nMax){
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int nByte; /* Total space to allocate */
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ThreadSet *p; /* Return value */
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nByte = sizeof(ThreadSet) + sizeof(struct Thread) * nMax;
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p = (ThreadSet *)testMalloc(nByte);
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p->nThread = nMax;
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p->aThread = (Thread *)&p[1];
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pthread_mutex_init(&p->mutex, 0);
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return p;
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}
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/*
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** Delete a thread-set object and release all resources held by it.
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*/
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static void testThreadShutdown(ThreadSet *p){
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int i;
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for(i=0; i<p->nThread; i++){
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testFree(p->aThread[i].zMsg);
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}
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pthread_mutex_destroy(&p->mutex);
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testFree(p);
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}
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static void *ttMain(void *pArg){
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Thread *pThread = (Thread *)pArg;
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int iThread;
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iThread = (pThread - pThread->pThreadSet->aThread);
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pThread->xMain(pThread->pThreadSet, iThread, pThread->pCtx);
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return 0;
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}
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/*
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** Launch a new thread.
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*/
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static int testThreadLaunch(
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ThreadSet *p,
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int iThread,
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void (*xMain)(ThreadSet *, int, void *),
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void *pCtx
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){
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int rc;
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Thread *pThread;
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assert( iThread>=0 && iThread<p->nThread );
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pThread = &p->aThread[iThread];
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assert( pThread->pThreadSet==0 );
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pThread->xMain = xMain;
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pThread->pCtx = pCtx;
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pThread->pThreadSet = p;
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rc = pthread_create(&pThread->id, 0, ttMain, (void *)pThread);
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return rc;
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}
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/*
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** Set the thread-set "halt" flag.
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*/
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static void testThreadSetHalt(ThreadSet *pThreadSet){
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pThreadSet->bHalt = 1;
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}
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/*
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** Return the current value of the thread-set "halt" flag.
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*/
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static int testThreadGetHalt(ThreadSet *pThreadSet){
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return pThreadSet->bHalt;
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}
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static void testThreadSleep(ThreadSet *pThreadSet, int nMs){
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int nRem = nMs;
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while( nRem>0 && testThreadGetHalt(pThreadSet)==0 ){
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usleep(50000);
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nRem -= 50;
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}
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}
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/*
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** Wait for all threads launched to finish before returning. If nMs
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** is greater than zero, set the "halt" flag to tell all threads
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** to halt after waiting nMs milliseconds.
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*/
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static void testThreadWait(ThreadSet *pThreadSet, int nMs){
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int i;
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testThreadSleep(pThreadSet, nMs);
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testThreadSetHalt(pThreadSet);
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for(i=0; i<pThreadSet->nThread; i++){
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Thread *pThread = &pThreadSet->aThread[i];
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if( pThread->xMain ){
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pthread_join(pThread->id, 0);
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}
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}
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}
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/*
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** Set the result for thread iThread.
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*/
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static void testThreadSetResult(
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ThreadSet *pThreadSet, /* Thread-set handle */
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int iThread, /* Set result for this thread */
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int rc, /* Result error code */
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char *zFmt, /* Result string format */
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... /* Result string formatting args... */
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){
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va_list ap;
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testFree(pThreadSet->aThread[iThread].zMsg);
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pThreadSet->aThread[iThread].rc = rc;
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pThreadSet->aThread[iThread].zMsg = 0;
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if( zFmt ){
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va_start(ap, zFmt);
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pThreadSet->aThread[iThread].zMsg = testMallocVPrintf(zFmt, ap);
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va_end(ap);
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}
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}
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/*
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** Retrieve the result for thread iThread.
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*/
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static int testThreadGetResult(
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ThreadSet *pThreadSet, /* Thread-set handle */
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int iThread, /* Get result for this thread */
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const char **pzRes /* OUT: Pointer to result string */
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){
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if( pzRes ) *pzRes = pThreadSet->aThread[iThread].zMsg;
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return pThreadSet->aThread[iThread].rc;
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}
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/*
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** Enter and leave the test case mutex.
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*/
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#if 0
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static void testThreadEnterMutex(ThreadSet *p){
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pthread_mutex_lock(&p->mutex);
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}
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static void testThreadLeaveMutex(ThreadSet *p){
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pthread_mutex_unlock(&p->mutex);
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}
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#endif
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#endif
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#if !defined(LSM_MUTEX_PTHREADS)
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static int testThreadSupport(){ return 0; }
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#define testThreadInit(a) 0
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#define testThreadShutdown(a)
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#define testThreadLaunch(a,b,c,d) 0
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#define testThreadWait(a,b)
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#define testThreadSetHalt(a)
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#define testThreadGetHalt(a) 0
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#define testThreadGetResult(a,b,c) 0
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#define testThreadSleep(a,b) 0
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static void testThreadSetResult(ThreadSet *a, int b, int c, char *d, ...){
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unused_parameter(a);
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unused_parameter(b);
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unused_parameter(c);
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unused_parameter(d);
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}
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#endif
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/* End of threads wrapper.
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*************************************************************************/
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/*************************************************************************
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** Below this point is the third part of this file - the implementation
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** of the mt1.* tests.
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*/
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typedef struct Mt1Test Mt1Test;
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struct Mt1Test {
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DbParameters param; /* Description of database to read/write */
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int nReadwrite; /* Number of read/write threads */
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int nFastReader; /* Number of fast reader threads */
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int nSlowReader; /* Number of slow reader threads */
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int nMs; /* How long to run for */
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const char *zSystem; /* Database system to test */
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};
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typedef struct Mt1DelayCtx Mt1DelayCtx;
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struct Mt1DelayCtx {
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ThreadSet *pSet; /* Threadset to sleep within */
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int nMs; /* Sleep in ms */
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};
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static void xMt1Delay(void *pCtx){
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Mt1DelayCtx *p = (Mt1DelayCtx *)pCtx;
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testThreadSleep(p->pSet, p->nMs);
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}
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#define MT1_THREAD_RDWR 0
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#define MT1_THREAD_SLOW 1
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#define MT1_THREAD_FAST 2
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static void xMt1Work(lsm_db *pDb, void *pCtx){
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#if 0
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char *z = 0;
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lsm_info(pDb, LSM_INFO_DB_STRUCTURE, &z);
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printf("%s\n", z);
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fflush(stdout);
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#endif
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}
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/*
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** This is the main() proc for all threads in test case "mt1".
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*/
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static void mt1Main(ThreadSet *pThreadSet, int iThread, void *pCtx){
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Mt1Test *p = (Mt1Test *)pCtx; /* Test parameters */
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Mt1DelayCtx delay;
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int nRead = 0; /* Number of calls to dbReadOperation() */
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int nWrite = 0; /* Number of completed database writes */
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int rc = 0; /* Error code */
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int iPrng; /* Prng argument variable */
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TestDb *pDb; /* Database handle */
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int eType;
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delay.pSet = pThreadSet;
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delay.nMs = 0;
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if( iThread<p->nReadwrite ){
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eType = MT1_THREAD_RDWR;
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}else if( iThread<(p->nReadwrite+p->nFastReader) ){
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|
eType = MT1_THREAD_FAST;
|
|
}else{
|
|
eType = MT1_THREAD_SLOW;
|
|
delay.nMs = (p->nMs / 20);
|
|
}
|
|
|
|
/* Open a new database connection. Initialize the pseudo-random number
|
|
** argument based on the thread number. */
|
|
iPrng = testPrngValue(iThread);
|
|
pDb = testOpen(p->zSystem, 0, &rc);
|
|
|
|
if( rc==0 ){
|
|
tdb_lsm_config_work_hook(pDb, xMt1Work, 0);
|
|
}
|
|
|
|
/* Loop until either an error occurs or some other thread sets the
|
|
** halt flag. */
|
|
while( rc==0 && testThreadGetHalt(pThreadSet)==0 ){
|
|
int iKey;
|
|
|
|
/* Perform a read operation on an arbitrarily selected key. */
|
|
iKey = (testPrngValue(iPrng++) % p->param.nKey);
|
|
dbReadOperation(&p->param, pDb, xMt1Delay, (void *)&delay, iKey, &rc);
|
|
if( rc ) continue;
|
|
nRead++;
|
|
|
|
/* Attempt to write an arbitrary key value pair (and update the associated
|
|
** checksum entries). dbWriteOperation() returns 1 if the write is
|
|
** successful, or 0 if it failed with an LSM_BUSY error. */
|
|
if( eType==MT1_THREAD_RDWR ){
|
|
char aValue[50];
|
|
char aRnd[25];
|
|
|
|
iKey = (testPrngValue(iPrng++) % p->param.nKey);
|
|
testPrngString(iPrng, aRnd, sizeof(aRnd));
|
|
iPrng += sizeof(aRnd);
|
|
snprintf(aValue, sizeof(aValue), "%d.%s", iThread, aRnd);
|
|
nWrite += dbWriteOperation(&p->param, pDb, iKey, aValue, &rc);
|
|
}
|
|
}
|
|
testClose(&pDb);
|
|
|
|
/* If an error has occured, set the thread error code and the threadset
|
|
** halt flag to tell the other test threads to halt. Otherwise, set the
|
|
** thread error code to 0 and post a message with the number of read
|
|
** and write operations completed. */
|
|
if( rc ){
|
|
testThreadSetResult(pThreadSet, iThread, rc, 0);
|
|
testThreadSetHalt(pThreadSet);
|
|
}else{
|
|
testThreadSetResult(pThreadSet, iThread, 0, "r/w: %d/%d", nRead, nWrite);
|
|
}
|
|
}
|
|
|
|
static void do_test_mt1(
|
|
const char *zSystem, /* Database system name */
|
|
const char *zPattern, /* Run test cases that match this pattern */
|
|
int *pRc /* IN/OUT: Error code */
|
|
){
|
|
Mt1Test aTest[] = {
|
|
/* param, nReadwrite, nFastReader, nSlowReader, nMs, zSystem */
|
|
{ {10, 1000}, 4, 0, 0, 10000, 0 },
|
|
{ {10, 1000}, 4, 4, 2, 100000, 0 },
|
|
{ {10, 100000}, 4, 0, 0, 10000, 0 },
|
|
{ {10, 100000}, 4, 4, 2, 100000, 0 },
|
|
};
|
|
int i;
|
|
|
|
for(i=0; *pRc==0 && i<ArraySize(aTest); i++){
|
|
Mt1Test *p = &aTest[i];
|
|
int bRun = testCaseBegin(pRc, zPattern,
|
|
"mt1.%s.db=%d,%d.ms=%d.rdwr=%d.fast=%d.slow=%d",
|
|
zSystem, p->param.nFanout, p->param.nKey,
|
|
p->nMs, p->nReadwrite, p->nFastReader, p->nSlowReader
|
|
);
|
|
if( bRun ){
|
|
TestDb *pDb;
|
|
ThreadSet *pSet;
|
|
int iThread;
|
|
int nThread;
|
|
|
|
p->zSystem = zSystem;
|
|
pDb = testOpen(zSystem, 1, pRc);
|
|
|
|
nThread = p->nReadwrite + p->nFastReader + p->nSlowReader;
|
|
pSet = testThreadInit(nThread);
|
|
for(iThread=0; *pRc==0 && iThread<nThread; iThread++){
|
|
testThreadLaunch(pSet, iThread, mt1Main, (void *)p);
|
|
}
|
|
|
|
testThreadWait(pSet, p->nMs);
|
|
for(iThread=0; *pRc==0 && iThread<nThread; iThread++){
|
|
*pRc = testThreadGetResult(pSet, iThread, 0);
|
|
}
|
|
testCaseFinish(*pRc);
|
|
|
|
for(iThread=0; *pRc==0 && iThread<nThread; iThread++){
|
|
const char *zMsg = 0;
|
|
*pRc = testThreadGetResult(pSet, iThread, &zMsg);
|
|
printf(" Info: thread %d (%d): %s\n", iThread, *pRc, zMsg);
|
|
}
|
|
|
|
testThreadShutdown(pSet);
|
|
testClose(&pDb);
|
|
}
|
|
}
|
|
}
|
|
|
|
void test_mt(
|
|
const char *zSystem, /* Database system name */
|
|
const char *zPattern, /* Run test cases that match this pattern */
|
|
int *pRc /* IN/OUT: Error code */
|
|
){
|
|
if( testThreadSupport()==0 ) return;
|
|
do_test_mt1(zSystem, zPattern, pRc);
|
|
}
|