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ICU-4477 Fix for using ICU on Windows, and the data being mapped is used by multiple users.

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X-SVN-Rev: 18771
This commit is contained in:
George Rhoten 2005-11-08 00:15:40 +00:00
parent d87f15055d
commit 99d3e09191
1 changed files with 21 additions and 1 deletions
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22
icu4c/source/common/umapfile.c
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@ -40,6 +40,7 @@
# define NOIME
# define NOMCX
# include <windows.h>
# include "cmemory.h"
typedef HANDLE MemoryMap;
@ -125,6 +126,9 @@
{
HANDLE map;
HANDLE file;
SECURITY_ATTRIBUTES mappingAttributes;
SECURITY_ATTRIBUTES *mappingAttributesPtr = NULL;
SECURITY_DESCRIPTOR securityDesc;
UDataMemory_init(pData); /* Clear the output struct. */
@ -136,8 +140,24 @@
return FALSE;
}
/* Declare and initialize a security descriptor.
This is required for multiuser systems on Windows 2000 SP4 and beyond */
if (InitializeSecurityDescriptor(&securityDesc, SECURITY_DESCRIPTOR_REVISION)) {
/* give the security descriptor a Null Dacl done using the "TRUE, (PACL)NULL" here */
if (SetSecurityDescriptorDacl(&securityDesc, TRUE, (PACL)NULL, FALSE)) {
/* Make the security attributes point to the security descriptor */
uprv_memset(&mappingAttributes, 0, sizeof(mappingAttributes));
mappingAttributes.nLength = sizeof(mappingAttributes);
mappingAttributes.lpSecurityDescriptor = &securityDesc;
mappingAttributes.bInheritHandle = FALSE; /* object uninheritable */
mappingAttributesPtr = &mappingAttributes;
}
}
/* else creating security descriptors can fail when we are on Windows 98,
and mappingAttributesPtr == NULL for that case. */
/* create an unnamed Windows file-mapping object for the specified file */
map=CreateFileMapping(file, NULL, PAGE_READONLY, 0, 0, NULL);
map=CreateFileMapping(file, mappingAttributesPtr, PAGE_READONLY, 0, 0, NULL);
CloseHandle(file);
if(map==NULL) {
return FALSE;