1 files changed, 127 insertions, 0 deletions
diff --git a/ext/lsm1/lsm-test/lsmtest4.c b/ext/lsm1/lsm-test/lsmtest4.c
new file mode 100644
index 0000000..a47241d
--- /dev/null
+++ b/ext/lsm1/lsm-test/lsmtest4.c
@@ -0,0 +1,127 @@
+
+/*
+** This file contains test cases involving multiple database clients.
+*/
+
+#include "lsmtest.h"
+
+/*
+** The following code implements test cases "mc1.*".
+**
+** This test case uses one writer and $nReader readers. All connections
+** are driven by a single thread. All connections are opened at the start
+** of the test and remain open until the test is finished.
+**
+** The test consists of $nStep steps. Each step the following is performed:
+**
+**   1. The writer inserts $nWriteStep records into the db.
+**
+**   2. The writer checks that the contents of the db are as expected.
+**
+**   3. Each reader that currently has an open read transaction also checks
+**      that the contents of the db are as expected (according to the snapshot
+**      the read transaction is reading - see below).
+**
+** After step 1, reader 1 opens a read transaction. After step 2, reader
+** 2 opens a read transaction, and so on. At step ($nReader+1), reader 1
+** closes the current read transaction and opens a new one. And so on.
+** The result is that at step N (for N > $nReader), there exists a reader
+** with an open read transaction reading the snapshot committed following
+** steps (N-$nReader-1) to N. 
+*/
+typedef struct Mctest Mctest;
+struct Mctest {
+  DatasourceDefn defn;            /* Datasource to use */
+  int nStep;                      /* Total number of steps in test */
+  int nWriteStep;                 /* Number of rows to insert each step */
+  int nReader;                    /* Number of read connections */
+};
+static void do_mc_test(
+  const char *zSystem,            /* Database system to test */
+  Mctest *pTest,
+  int *pRc                        /* IN/OUT: return code */
+){
+  const int nDomain = pTest->nStep * pTest->nWriteStep;
+  Datasource *pData;              /* Source of data */
+  TestDb *pDb;                    /* First database connection (writer) */
+  int iReader;                    /* Used to iterate through aReader */
+  int iStep;                      /* Current step in test */
+  int iDot = 0;                   /* Current step in test */
+
+  /* Array of reader connections */
+  struct Reader {
+    TestDb *pDb;                  /* Connection handle */
+    int iLast;                    /* Current snapshot contains keys 0..iLast */
+  } *aReader;
+
+  /* Create a data source */
+  pData = testDatasourceNew(&pTest->defn);
+
+  /* Open the writer connection */
+  pDb = testOpen(zSystem, 1, pRc);
+
+  /* Allocate aReader */
+  aReader = (struct Reader *)testMalloc(sizeof(aReader[0]) * pTest->nReader);
+  for(iReader=0; iReader<pTest->nReader; iReader++){
+    aReader[iReader].pDb = testOpen(zSystem, 0, pRc);
+  }
+
+  for(iStep=0; iStep<pTest->nStep; iStep++){
+    int iLast;
+    int iBegin;                   /* Start read trans using aReader[iBegin] */
+
+    /* Insert nWriteStep more records into the database */
+    int iFirst = iStep*pTest->nWriteStep;
+    testWriteDatasourceRange(pDb, pData, iFirst, pTest->nWriteStep, pRc);
+
+    /* Check that the db is Ok according to the writer */
+    iLast = (iStep+1) * pTest->nWriteStep - 1;
+    testDbContents(pDb, pData, nDomain, 0, iLast, iLast, 1, pRc);
+
+    /* Have reader (iStep % nReader) open a read transaction here. */
+    iBegin = (iStep % pTest->nReader);
+    if( iBegin<iStep ) tdb_commit(aReader[iBegin].pDb, 0);
+    tdb_begin(aReader[iBegin].pDb, 1);
+    aReader[iBegin].iLast = iLast;
+
+    /* Check that the db is Ok for each open reader */
+    for(iReader=0; iReader<pTest->nReader && aReader[iReader].iLast; iReader++){
+      iLast = aReader[iReader].iLast;
+      testDbContents(
+          aReader[iReader].pDb, pData, nDomain, 0, iLast, iLast, 1, pRc
+      );
+    }
+
+    /* Report progress */
+    testCaseProgress(iStep, pTest->nStep, testCaseNDot(), &iDot);
+  }
+
+  /* Close all readers */
+  for(iReader=0; iReader<pTest->nReader; iReader++){
+    testClose(&aReader[iReader].pDb);
+  }
+  testFree(aReader);
+
+  /* Close the writer-connection and free the datasource */
+  testClose(&pDb);
+  testDatasourceFree(pData);
+}
+
+
+void test_mc(
+  const char *zSystem,            /* Database system name */
+  const char *zPattern,           /* Run test cases that match this pattern */
+  int *pRc                        /* IN/OUT: Error code */
+){
+  int i;
+  Mctest aTest[] = {
+    { { TEST_DATASOURCE_RANDOM, 10,10, 100,100 }, 100, 10, 5 },
+  };
+
+  for(i=0; i<ArraySize(aTest); i++){
+    if( testCaseBegin(pRc, zPattern, "mc1.%s.%d", zSystem, i) ){
+      do_mc_test(zSystem, &aTest[i], pRc);
+      testCaseFinish(*pRc);
+    }
+  }
+}