Commit b0d26c26 authored by unknown's avatar unknown
Browse files

os0file.c: 

  Fix InnoDB bug: on HP-UX, with a 32-bit binary, InnoDB was only able to read or write <= 2 GB files; the reason was that InnoDB treated the return value of lseek() as a 32-bit integer; lseek was used on HP-UX-11 as a replacement for pread() and pwrite() because HAVE_BROKEN_PREAD was defined on that platform


innobase/os/os0file.c:
  Fix InnoDB bug: on HP-UX, with a 32-bit binary, InnoDB was only able to read or write <= 2 GB files; the reason was that InnoDB treated the return value of lseek() as a 32-bit integer; lseek was used on HP-UX-11 as a replacement for pread() and pwrite() because HAVE_BROKEN_PREAD was defined on that platform
parent 9cee9f69

innobase/os/os0file.c

+10 −8
Original line number Diff line number Diff line
@@ -6,6 +6,8 @@ The interface to the operating system file i/o primitives 
Created 10/21/1995 Heikki Tuuri

*******************************************************/



#define HAVE_BROKEN_PREAD



#include "os0file.h"

#include "os0sync.h"

#include "os0thread.h"
@@ -14,8 +16,6 @@ Created 10/21/1995 Heikki Tuuri 
#include "fil0fil.h"

#include "buf0buf.h"



#undef HAVE_FDATASYNC



#ifdef POSIX_ASYNC_IO

/* We assume in this case that the OS has standard Posix aio (at least SunOS

2.6, HP-UX 11i and AIX 4.3 have) */
@@ -1195,6 +1195,7 @@ os_file_pread( 
	return(n_bytes);

#else

	{

	off_t	ret_offset;

	ssize_t	ret;

	ulint	i;
@@ -1203,12 +1204,12 @@ os_file_pread( 
	

	os_mutex_enter(os_file_seek_mutexes[i]);



	ret = lseek(file, offs, 0);

	ret_offset = lseek(file, offs, SEEK_SET);



	if (ret < 0) {

	if (ret_offset < 0) {

		os_mutex_exit(os_file_seek_mutexes[i]);



		return(ret);

		return(-1);

	}

	

	ret = read(file, buf, (ssize_t)n);
@@ -1281,6 +1282,7 @@ os_file_pwrite( 
        return(ret);

#else

	{

	off_t	ret_offset;

	ulint	i;



	/* Protect the seek / write operation with a mutex */
@@ -1288,12 +1290,12 @@ os_file_pwrite( 
	

	os_mutex_enter(os_file_seek_mutexes[i]);



	ret = lseek(file, offs, 0);

	ret_offset = lseek(file, offs, SEEK_SET);



	if (ret < 0) {

	if (ret_offset < 0) {

		os_mutex_exit(os_file_seek_mutexes[i]);



		return(ret);

		return(-1);

	}

	

	ret = write(file, buf, (ssize_t)n);