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Overview
Comment:Suppress compiler warnings. Fix a bug in IO error detection on windows. (CVS 3564)
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SHA1: daed2bab00ea3952d2d4e5182ca07653b9d80ac2
User & Date: drh 2007-01-05 14:38:55.000
Context
2007-01-05
14:41
Remove redundant variable. (CVS 3565) (check-in: 2a7f5aaf82 user: drh tags: trunk)
14:38
Suppress compiler warnings. Fix a bug in IO error detection on windows. (CVS 3564) (check-in: daed2bab00 user: drh tags: trunk)
02:00
In the btree.c, when releasing the page1 lock, first make sure the pager has not reset and released the lock already. This fixes a bug introduced by (3549). (CVS 3563) (check-in: 36a2db96ef user: drh tags: trunk)
Changes
Unified Diff Ignore Whitespace Patch
Changes to src/os_win.c.
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*/
static int winRead(OsFile *id, void *pBuf, int amt){
  DWORD got;
  assert( id!=0 );
  SimulateIOError(return SQLITE_IOERR);
  TRACE3("READ %d lock=%d\n", ((winFile*)id)->h, ((winFile*)id)->locktype);
  if( !ReadFile(((winFile*)id)->h, pBuf, amt, &got, 0) ){
    got = -1;
  }
  if( got==(DWORD)amt ){
    return SQLITE_OK;
  }else if( got<0 ){
    return SQLITE_IOERR_READ;
  }else{
    memset(&((char*)pBuf)[got], 0, amt-got);
    return SQLITE_IOERR_SHORT_READ;
  }
}

/*








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*/
static int winRead(OsFile *id, void *pBuf, int amt){
  DWORD got;
  assert( id!=0 );
  SimulateIOError(return SQLITE_IOERR);
  TRACE3("READ %d lock=%d\n", ((winFile*)id)->h, ((winFile*)id)->locktype);
  if( !ReadFile(((winFile*)id)->h, pBuf, amt, &got, 0) ){
    return SQLITE_IOERR_READ;
  }
  if( got==(DWORD)amt ){
    return SQLITE_OK;


  }else{
    memset(&((char*)pBuf)[got], 0, amt-got);
    return SQLITE_IOERR_SHORT_READ;
  }
}

/*
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Changes to src/random.c.
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*************************************************************************
** This file contains code to implement a pseudo-random number
** generator (PRNG) for SQLite.
**
** Random numbers are used by some of the database backends in order
** to generate random integer keys for tables or random filenames.
**
** $Id: random.c,v 1.15 2006/01/06 14:32:20 drh Exp $
*/
#include "sqliteInt.h"
#include "os.h"


/*
** Get a single 8-bit random value from the RC4 PRNG.  The Mutex








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*************************************************************************
** This file contains code to implement a pseudo-random number
** generator (PRNG) for SQLite.
**
** Random numbers are used by some of the database backends in order
** to generate random integer keys for tables or random filenames.
**
** $Id: random.c,v 1.16 2007/01/05 14:38:56 drh Exp $
*/
#include "sqliteInt.h"
#include "os.h"


/*
** Get a single 8-bit random value from the RC4 PRNG.  The Mutex
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** to know.  To minimize the risk of problems due to bad lrand48()
** implementations, SQLite uses this random number generator based
** on RC4, which we know works very well.
**
** (Later):  Actually, OP_NewRowid does not depend on a good source of
** randomness any more.  But we will leave this code in all the same.
*/
static int randomByte(){
  unsigned char t;

  /* All threads share a single random number generator.
  ** This structure is the current state of the generator.
  */
  static struct {
    unsigned char isInit;          /* True if initialized */








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** to know.  To minimize the risk of problems due to bad lrand48()
** implementations, SQLite uses this random number generator based
** on RC4, which we know works very well.
**
** (Later):  Actually, OP_NewRowid does not depend on a good source of
** randomness any more.  But we will leave this code in all the same.
*/
static int randomByte(void){
  unsigned char t;

  /* All threads share a single random number generator.
  ** This structure is the current state of the generator.
  */
  static struct {
    unsigned char isInit;          /* True if initialized */
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