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wincache_aplist.c
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/*
+----------------------------------------------------------------------------------------------+
| Windows Cache for PHP |
+----------------------------------------------------------------------------------------------+
| Copyright (c) 2009, Microsoft Corporation. All rights reserved. |
| |
| Redistribution and use in source and binary forms, with or without modification, are |
| permitted provided that the following conditions are met: |
| - Redistributions of source code must retain the above copyright notice, this list of |
| conditions and the following disclaimer. |
| - Redistributions in binary form must reproduce the above copyright notice, this list of |
| conditions and the following disclaimer in the documentation and/or other materials provided |
| with the distribution. |
| - Neither the name of the Microsoft Corporation nor the names of its contributors may be |
| used to endorse or promote products derived from this software without specific prior written|
| permission. |
| |
| THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS |
| OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
| MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE |
| COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE|
| GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED |
| AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING |
| NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED |
| OF THE POSSIBILITY OF SUCH DAMAGE. |
+----------------------------------------------------------------------------------------------+
| Module: wincache_aplist.c |
+----------------------------------------------------------------------------------------------+
| Author: Kanwaljeet Singla <[email protected]> |
+----------------------------------------------------------------------------------------------+
*/
#include "precomp.h"
#define PER_RUN_SCAVENGE_COUNT 256
#define DO_PARTIAL_SCAVENGER_RUN 0
#define DO_FULL_SCAVENGER_RUN 1
#define SCAVENGER_STATUS_INVALID 255
#define SCAVENGER_STATUS_INACTIVE 0
#define SCAVENGER_STATUS_ACTIVE 1
#define DO_FILE_CHANGE_CHECK 1
#define NO_FILE_CHANGE_CHECK 0
#define FILE_IS_NOT_CHANGED 0
#define FILE_IS_CHANGED 1
#define APLIST_VALUE(p, o) ((aplist_value *)alloc_get_cachevalue(p, o))
static int find_aplist_entry(aplist_context * pcache, const char * filename, unsigned int index, unsigned char docheck, aplist_value ** ppvalue, aplist_value ** ppdelete);
static int is_file_changed(aplist_context * pcache, aplist_value * pvalue);
static int create_aplist_data(aplist_context * pcache, const char * filename, aplist_value ** ppvalue);
static void destroy_aplist_data(aplist_context * pcache, aplist_value * pvalue);
static void add_aplist_entry(aplist_context * pcache, unsigned int index, aplist_value * pvalue);
static void remove_aplist_entry(aplist_context * pcache, unsigned int index, aplist_value * pvalue);
static void delete_aplist_fileentry(aplist_context * pcache, const char * filename);
static void run_aplist_scavenger(aplist_context * pcache, unsigned char ffull);
static int set_lastcheck_time(aplist_context * pcache, const char * filename, unsigned int newvalue TSRMLS_DC);
/* Globals */
unsigned short glcacheid = 1;
/* Private methods */
/* Call this method atleast under a read lock */
/* If an entry for filename with is_deleted is found, return that in ppdelete */
static int find_aplist_entry(aplist_context * pcache, const char * filename, unsigned int index, unsigned char docheck, aplist_value ** ppvalue, aplist_value ** ppdelete)
{
int result = NONFATAL;
aplist_header * header = NULL;
aplist_value * pvalue = NULL;
dprintverbose("start find_aplist_entry");
_ASSERT(pcache != NULL);
_ASSERT(filename != NULL);
_ASSERT(ppvalue != NULL);
*ppvalue = NULL;
if(ppdelete != NULL)
{
*ppdelete = NULL;
}
header = pcache->apheader;
pvalue = APLIST_VALUE(pcache->apalloc, header->values[index]);
while(pvalue != NULL)
{
if(!_stricmp(pcache->apmemaddr + pvalue->file_path, filename))
{
/* Ignore entries which are marked deleted */
if(pvalue->is_deleted == 1)
{
/* If this process is good to delete the opcode */
/* cache data tell caller to delete it */
if(ppdelete != NULL && *ppdelete == NULL &&
pcache->apctype == APLIST_TYPE_GLOBAL && pcache->pocache != NULL && pcache->polocal == NULL)
{
*ppdelete = pvalue;
}
pvalue = APLIST_VALUE(pcache->apalloc, pvalue->next_value);
continue;
}
if(docheck)
{
/* If fcnotify is 0, use traditional file change check */
if(pvalue->fcnotify == 0)
{
if(is_file_changed(pcache, pvalue))
{
result = FATAL_FCACHE_FILECHANGED;
}
}
else
{
if(pvalue->is_changed == 1)
{
result = FATAL_FCACHE_FILECHANGED;
}
else
{
/* If a listener is present, just check if listener is still active */
if(pcache->pnotify != NULL)
{
result = fcnotify_check(pcache->pnotify, NULL, &pvalue->fcnotify, &pvalue->fcncount);
if(FAILED(result))
{
/* Do a hard file change check if file listener is suggesting it */
if(result == WARNING_FCNOTIFY_FORCECHECK)
{
result = NONFATAL;
if(is_file_changed(pcache, pvalue))
{
result = FATAL_FCACHE_FILECHANGED;
}
}
else
{
goto Finished;
}
}
}
}
}
}
break;
}
pvalue = APLIST_VALUE(pcache->apalloc, pvalue->next_value);
}
*ppvalue = pvalue;
Finished:
dprintverbose("end find_aplist_entry");
return result;
}
/* Call this method atleast under a read lock */
static int is_file_changed(aplist_context * pcache, aplist_value * pvalue)
{
HRESULT hr = S_OK;
int retvalue = 0;
unsigned int tickcount = 0;
unsigned int difftime = 0;
WIN32_FILE_ATTRIBUTE_DATA fileData;
dprintverbose("start is_file_changed");
_ASSERT(pcache != NULL);
_ASSERT(pvalue != NULL);
/* If fchangefreq is set to 0, dont do the file change check */
/* last_check value of 0 means that a check must be done */
if(pvalue->last_check != 0 && pcache->fchangefreq == 0)
{
goto Finished;
}
/* Calculate difftime while taking care of rollover */
tickcount = GetTickCount();
difftime = utils_ticksdiff(tickcount, pvalue->last_check);
if(pvalue->last_check != 0 && difftime < pcache->fchangefreq)
{
goto Finished;
}
retvalue = 1;
if (!GetFileAttributesEx(pcache->apmemaddr + pvalue->file_path, GetFileExInfoStandard, &fileData))
{
hr = HRESULT_FROM_WIN32(GetLastError());
dprintimportant("GetFileAttributesEx returned error %d", hr);
if (hr == HRESULT_FROM_WIN32(ERROR_BAD_NET_NAME) ||
hr == HRESULT_FROM_WIN32(ERROR_BAD_NETPATH) ||
hr == HRESULT_FROM_WIN32(ERROR_NETNAME_DELETED) ||
hr == HRESULT_FROM_WIN32(ERROR_REM_NOT_LIST) ||
hr == HRESULT_FROM_WIN32(ERROR_SEM_TIMEOUT) ||
hr == HRESULT_FROM_WIN32(ERROR_NETWORK_BUSY) ||
hr == HRESULT_FROM_WIN32(ERROR_UNEXP_NET_ERR) ||
hr == HRESULT_FROM_WIN32(ERROR_NETWORK_UNREACHABLE))
{
retvalue = 0;
}
goto Finished;
}
_ASSERT(fileData.nFileSizeHigh == 0);
/* If the attributes, WriteTime, and if it is a file, size are same */
/* then the file has not changed. File sizes greater than 4GB won't */
/* get added to cache. So comparing only nFileSizeLow is sufficient */
if (fileData.dwFileAttributes == pvalue->attributes &&
*(__int64 *)&fileData.ftLastWriteTime / 10000000 ==
*(__int64 *)&pvalue->modified_time / 10000000 &&
((fileData.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) ||
(fileData.nFileSizeLow == pvalue->file_size)))
{
retvalue = 0;
}
pvalue->last_check = tickcount;
Finished:
dprintverbose("end is_file_changed");
return retvalue;
}
/* Call this method without any lock */
static int create_aplist_data(aplist_context * pcache, const char * filename, aplist_value ** ppvalue)
{
int result = NONFATAL;
HRESULT hr = S_OK;
unsigned int ticks = 0;
char * filepath = NULL;
HANDLE hFile = INVALID_HANDLE_VALUE;
unsigned int filesizel = 0;
unsigned int filesizeh = 0;
unsigned int openflags = 0;
BY_HANDLE_FILE_INFORMATION finfo;
aplist_value * pvalue = NULL;
unsigned int flength = 0;
unsigned int alloclen = 0;
char * pbaseadr = NULL;
char * pcurrent = NULL;
dprintverbose("start create_aplist_data");
_ASSERT(pcache != NULL);
_ASSERT(filename != NULL);
_ASSERT(ppvalue != NULL);
*ppvalue = NULL;
flength = strlen(filename);
alloclen = sizeof(aplist_value) + ALIGNDWORD(flength + 1);
/* Allocate memory for cache entry in shared memory */
pbaseadr = (char *)alloc_smalloc(pcache->apalloc, alloclen);
if(pbaseadr == NULL)
{
/* If scavenger is active, run it and try allocating again */
if(pcache->scstatus == SCAVENGER_STATUS_ACTIVE)
{
lock_writelock(pcache->aprwlock);
run_aplist_scavenger(pcache, DO_FULL_SCAVENGER_RUN);
pcache->apheader->lscavenge = GetTickCount();
lock_writeunlock(pcache->aprwlock);
pbaseadr = (char *)alloc_smalloc(pcache->apalloc, alloclen);
if(pbaseadr == NULL)
{
result = FATAL_OUT_OF_SMEMORY;
goto Finished;
}
}
else
{
result = FATAL_OUT_OF_SMEMORY;
goto Finished;
}
}
pcurrent = pbaseadr;
pvalue = (aplist_value *)pcurrent;
pvalue->file_path = 0;
/* Open the file in shared read mode */
openflags |= FILE_ATTRIBUTE_ENCRYPTED;
openflags |= FILE_FLAG_OVERLAPPED;
openflags |= FILE_FLAG_BACKUP_SEMANTICS;
openflags |= FILE_FLAG_SEQUENTIAL_SCAN;
hFile = CreateFile(filename, GENERIC_READ, FILE_SHARE_READ, NULL, OPEN_EXISTING, openflags, NULL);
if(hFile == INVALID_HANDLE_VALUE)
{
error_setlasterror();
result = FATAL_FCACHE_CREATEFILE;
goto Finished;
}
/* Fail if file type is not of type_disk */
if(GetFileType(hFile) != FILE_TYPE_DISK)
{
result = FATAL_FCACHE_GETFILETYPE;
goto Finished;
}
filesizel = GetFileSize(hFile, &filesizeh);
if(filesizel == INVALID_FILE_SIZE)
{
error_setlasterror();
result = FATAL_FCACHE_GETFILESIZE;
goto Finished;
}
/* File sizes greater than 4096MB not allowed */
_ASSERT(filesizeh == 0);
if(!GetFileInformationByHandle(hFile, &finfo))
{
error_setlasterror();
result = FATAL_FCACHE_FILEINFO;
goto Finished;
}
/* Point pcurrent to end of aplist_value */
/* No goto Finished should exist after this */
pcurrent += sizeof(aplist_value);
/* Fill the details in aplist_value */
/* memcpy_s error code ignored as buffer is of right size */
memcpy_s(pcurrent, flength, filename, flength);
*(pcurrent + flength) = 0;
pvalue->file_path = pcurrent - pcache->apmemaddr;
pvalue->file_size = filesizel;
pvalue->modified_time = finfo.ftLastWriteTime;
pvalue->attributes = finfo.dwFileAttributes;
ticks = GetTickCount();
pvalue->add_ticks = ticks;
pvalue->use_ticks = ticks;
pvalue->last_check = ticks;
pvalue->is_deleted = 0;
pvalue->is_changed = 0;
pvalue->fcacheval = 0;
pvalue->ocacheval = 0;
pvalue->resentry = 0;
pvalue->fcnotify = 0;
pvalue->fcncount = 0;
pvalue->prev_value = 0;
pvalue->next_value = 0;
/* Add file listener only if the file is not pointing to a UNC share */
if(pcache->pnotify != NULL && IS_UNC_PATH(filename, flength) == 0)
{
result = fcnotify_check(pcache->pnotify, filename, &pvalue->fcnotify, &pvalue->fcncount);
if(FAILED(result))
{
goto Finished;
}
}
*ppvalue = pvalue;
_ASSERT(SUCCEEDED(result));
Finished:
if(hFile != INVALID_HANDLE_VALUE)
{
CloseHandle(hFile);
hFile = INVALID_HANDLE_VALUE;
}
if(FAILED(result))
{
dprintimportant("failure %d in create_aplist_data", result);
if(pbaseadr != NULL)
{
alloc_sfree(pcache->apalloc, pbaseadr);
pbaseadr = NULL;
}
}
dprintverbose("end create_aplist_data");
return result;
}
/* Call this method under write lock if resentry can be non-zero so that */
/* rplist can never have an offset of aplist which is not valid */
static void destroy_aplist_data(aplist_context * pcache, aplist_value * pvalue)
{
dprintverbose("start destroy_aplist_data");
if(pvalue != NULL)
{
if(pcache->pnotify != NULL && pvalue->fcnotify != 0)
{
fcnotify_close(pcache->pnotify, &pvalue->fcnotify, &pvalue->fcncount);
}
/* Resolve path cache, file cache and ocache entries */
/* should be deleted by a call to remove_aplist_entry */
_ASSERT(pvalue->resentry == 0);
_ASSERT(pvalue->fcacheval == 0);
_ASSERT(pvalue->ocacheval == 0);
alloc_sfree(pcache->apalloc, pvalue);
pvalue = NULL;
}
dprintverbose("end destroy_aplist_data");
}
/* Call this method under the write lock */
static void add_aplist_entry(aplist_context * pcache, unsigned int index, aplist_value * pvalue)
{
aplist_header * header = NULL;
aplist_value * pcheck = NULL;
dprintverbose("start add_aplist_entry");
_ASSERT(pcache != NULL);
_ASSERT(pvalue != NULL);
_ASSERT(pvalue->file_path != 0);
header = pcache->apheader;
pcheck = APLIST_VALUE(pcache->apalloc, header->values[index]);
/* New entry gets added in the end. This is required for is_deleted to work correctly */
while(pcheck != NULL)
{
if(pcheck->next_value == 0)
{
break;
}
pcheck = APLIST_VALUE(pcache->apalloc, pcheck->next_value);
}
if(pcheck != NULL)
{
pcheck->next_value = alloc_get_valueoffset(pcache->apalloc, pvalue);
pvalue->next_value = 0;
pvalue->prev_value = alloc_get_valueoffset(pcache->apalloc, pcheck);
}
else
{
header->values[index] = alloc_get_valueoffset(pcache->apalloc, pvalue);
pvalue->next_value = 0;
pvalue->prev_value = 0;
}
header->itemcount++;
dprintverbose("end add_aplist_entry");
return;
}
/* Call this method under write lock */
static void remove_aplist_entry(aplist_context * pcache, unsigned int index, aplist_value * pvalue)
{
alloc_context * apalloc = NULL;
aplist_header * header = NULL;
aplist_value * ptemp = NULL;
fcache_value * pfvalue = NULL;
ocache_value * povalue = NULL;
dprintverbose("start remove_aplist_entry");
_ASSERT(pcache != NULL);
_ASSERT(pvalue != NULL);
_ASSERT(pvalue->file_path != 0);
/* If entry from global cache is removed by a process which has */
/* a local cache, mark the entry deleted but do not delete it */
if(pcache->apctype == APLIST_TYPE_GLOBAL && pcache->pocache == NULL && pcache->polocal != NULL)
{
/* Mark resolve path entries deleted so that it rplist stop */
/* handing pointer to aplist entries which are marked deleted */
if(pvalue->resentry != 0)
{
_ASSERT(pcache->prplist != NULL);
rplist_markdeleted(pcache->prplist, pvalue->resentry);
}
pvalue->is_deleted = 1;
goto Finished;
}
/* Delete resolve path cache entries */
if(pvalue->resentry != 0)
{
_ASSERT(pcache->prplist != NULL);
rplist_deleteval(pcache->prplist, pvalue->resentry);
pvalue->resentry = 0;
}
/* Delete file cache entry */
if(pvalue->fcacheval != 0)
{
_ASSERT(pcache->pfcache != NULL);
pfvalue = fcache_getvalue(pcache->pfcache, pvalue->fcacheval);
InterlockedExchange(&pfvalue->is_deleted, 1);
pvalue->fcacheval = 0;
if(InterlockedCompareExchange(&pfvalue->refcount, 0, 0) == 0)
{
fcache_destroyval(pcache->pfcache, pfvalue);
pfvalue = NULL;
}
}
/* Delete opcode cache entry */
if(pvalue->ocacheval != 0)
{
_ASSERT(pcache->pocache != NULL);
povalue = ocache_getvalue(pcache->pocache, pvalue->ocacheval);
InterlockedExchange(&povalue->is_deleted, 1);
pvalue->ocacheval = 0;
if(InterlockedCompareExchange(&povalue->refcount, 0, 0) == 0)
{
ocache_destroyval(pcache->pocache, povalue);
povalue = NULL;
}
}
apalloc = pcache->apalloc;
header = pcache->apheader;
/* Decrement itemcount and remove entry from hashtable */
header->itemcount--;
if(pvalue->prev_value == 0)
{
header->values[index] = pvalue->next_value;
if(pvalue->next_value != 0)
{
ptemp = APLIST_VALUE(apalloc, pvalue->next_value);
ptemp->prev_value = 0;
}
}
else
{
ptemp = APLIST_VALUE(apalloc, pvalue->prev_value);
ptemp->next_value = pvalue->next_value;
if(pvalue->next_value != 0)
{
ptemp = APLIST_VALUE(apalloc, pvalue->next_value);
ptemp->prev_value = pvalue->prev_value;
}
}
/* Destroy aplist data now that fcache and ocache is deleted */
destroy_aplist_data(pcache, pvalue);
pvalue = NULL;
Finished:
dprintverbose("end remove_aplist_entry");
return;
}
/* Call this method under write lock */
static void delete_aplist_fileentry(aplist_context * pcache, const char * filename)
{
unsigned int findex = 0;
aplist_value * pvalue = NULL;
dprintverbose("start delete_aplist_fileentry");
/* This method should be called to remove file entry from a local cache */
/* list when the file is removed the global list to keep them in sync */
_ASSERT(pcache != NULL);
_ASSERT(pcache->islocal != 0);
_ASSERT(filename != NULL);
_ASSERT(IS_ABSOLUTE_PATH(filename, strlen(filename)));
findex = utils_getindex(filename, pcache->apheader->valuecount);
find_aplist_entry(pcache, filename, findex, NO_FILE_CHANGE_CHECK, &pvalue, NULL);
/* If an entry is found for this file, remove it */
if(pvalue != NULL)
{
remove_aplist_entry(pcache, findex, pvalue);
pvalue = NULL;
}
dprintverbose("end delete_aplist_fileentry");
return;
}
/* Call this method under write lock */
static void run_aplist_scavenger(aplist_context * pcache, unsigned char ffull)
{
unsigned int sindex = 0;
unsigned int eindex = 0;
alloc_context * apalloc = NULL;
aplist_header * apheader = NULL;
aplist_value * ptemp = NULL;
aplist_value * pvalue = NULL;
unsigned int ticks = 0;
dprintverbose("start run_aplist_scavenger");
_ASSERT(pcache != NULL);
_ASSERT(pcache->scstatus == SCAVENGER_STATUS_ACTIVE);
ticks = GetTickCount();
apalloc = pcache->apalloc;
apheader = pcache->apheader;
if(ffull)
{
sindex = 0;
eindex = apheader->valuecount;
apheader->scstart = 0;
}
else
{
sindex = apheader->scstart;
eindex = sindex + PER_RUN_SCAVENGE_COUNT;
apheader->scstart = eindex;
if(eindex >= apheader->valuecount)
{
eindex = apheader->valuecount;
apheader->scstart = 0;
}
}
dprintimportant("aplist scavenger sindex = %d, eindex = %d", sindex, eindex);
for( ;sindex < eindex; sindex++)
{
if(apheader->values[sindex] == 0)
{
continue;
}
pvalue = APLIST_VALUE(apalloc, apheader->values[sindex]);
while(pvalue != NULL)
{
ptemp = pvalue;
pvalue = APLIST_VALUE(apalloc, pvalue->next_value);
/* Remove entry if its marked deleted or is unused for ttlmax time */
if(ptemp->is_deleted || (utils_ticksdiff(ticks, ptemp->use_ticks) > apheader->ttlmax))
{
remove_aplist_entry(pcache, sindex, ptemp);
ptemp = NULL;
}
}
}
dprintverbose("end run_aplist_scavenger");
return;
}
/* Public functions */
int aplist_create(aplist_context ** ppcache)
{
int result = NONFATAL;
aplist_context * pcache = NULL;
dprintverbose("start aplist_create");
_ASSERT(ppcache != NULL);
*ppcache = NULL;
pcache = (aplist_context *)alloc_pemalloc(sizeof(aplist_context));
if(pcache == NULL)
{
result = FATAL_OUT_OF_LMEMORY;
goto Finished;
}
pcache->id = glcacheid++;
pcache->islocal = 0;
pcache->apctype = APLIST_TYPE_INVALID;
pcache->scstatus = SCAVENGER_STATUS_INVALID;
pcache->hinitdone = NULL;
pcache->fchangefreq = 0;
pcache->apmemaddr = NULL;
pcache->apheader = NULL;
pcache->apfilemap = NULL;
pcache->aprwlock = NULL;
pcache->apalloc = NULL;
pcache->polocal = NULL;
pcache->prplist = NULL;
pcache->pnotify = NULL;
pcache->pfcache = NULL;
pcache->pocache = NULL;
pcache->resnumber = -1;
*ppcache = pcache;
Finished:
if(FAILED(result))
{
dprintimportant("failure %d in aplist_create", result);
}
dprintverbose("end aplist_create");
return result;
}
void aplist_destroy(aplist_context * pcache)
{
dprintverbose("start aplist_destroy");
if(pcache != NULL)
{
alloc_pefree(pcache);
pcache = NULL;
}
dprintverbose("end aplist_destroy");
return;
}
int aplist_initialize(aplist_context * pcache, unsigned short apctype, unsigned int filecount, unsigned int fchangefreq, unsigned int ttlmax TSRMLS_DC)
{
int result = NONFATAL;
size_t mapsize = 0;
size_t segsize = 0;
aplist_header * header = NULL;
unsigned int msize = 0;
unsigned short cachekey = 1;
unsigned int cticks = 0;
unsigned short mapclass = FILEMAP_MAP_SRANDOM;
unsigned short locktype = LOCK_TYPE_SHARED;
unsigned char isfirst = 1;
unsigned char islocked = 0;
unsigned int initmemory = 0;
char * prefix = NULL;
size_t cchprefix = 0;
DWORD ret = 0;
dprintverbose("start aplist_initialize");
_ASSERT(pcache != NULL);
_ASSERT(apctype == APLIST_TYPE_GLOBAL || apctype == APLIST_TYPE_OPCODE_LOCAL);
_ASSERT(filecount >= NUM_FILES_MINIMUM && filecount <= NUM_FILES_MAXIMUM);
_ASSERT((fchangefreq >= FCHECK_FREQ_MINIMUM && fchangefreq <= FCHECK_FREQ_MAXIMUM) || fchangefreq == 0);
_ASSERT((ttlmax >= TTL_VALUE_MINIMUM && ttlmax <= TTL_VALUE_MAXIMUM) || ttlmax == 0);
/* If more APLIST_TYPE entries are added, add code to control value of islocal carefully */
pcache->apctype = apctype;
pcache->islocal = pcache->apctype;
/* Disable scavenger if opcode cache is local only */
/* Or if ttlmax value is set to 0 */
pcache->scstatus = SCAVENGER_STATUS_ACTIVE;
if(pcache->apctype == APLIST_TYPE_OPCODE_LOCAL || ttlmax == 0)
{
pcache->scstatus = SCAVENGER_STATUS_INACTIVE;
}
/* Initialize memory map to store file list */
result = filemap_create(&pcache->apfilemap);
if(FAILED(result))
{
goto Finished;
}
/* Desired cache size 2MB for 1024 entries. Expression below gives that */
mapsize = ((filecount + 1023) * 2) / 1024;
if(pcache->islocal)
{
mapclass = FILEMAP_MAP_LRANDOM;
locktype = LOCK_TYPE_LOCAL;
}
/* get object name prefix */
result = lock_get_nameprefix("FILELIST_CACHE", cachekey, locktype, &prefix, &cchprefix);
if (FAILED(result))
{
goto Finished;
}
result = utils_create_init_event(prefix, "APLIST_INIT", &pcache->hinitdone, &isfirst);
if (FAILED(result))
{
result = FATAL_APLIST_INIT_EVENT;
goto Finished;
}
islocked = 1;
/* shmfilepath = NULL to make it use page file */
result = filemap_initialize(pcache->apfilemap, FILEMAP_TYPE_FILELIST, cachekey, mapclass, mapsize, isfirst, NULL TSRMLS_CC);
if(FAILED(result))
{
goto Finished;
}
pcache->apmemaddr = (char *)pcache->apfilemap->mapaddr;
segsize = filemap_getsize(pcache->apfilemap TSRMLS_CC);
initmemory = (pcache->apfilemap->existing == 0);
/* Create allocator for file list segment */
result = alloc_create(&pcache->apalloc);
if(FAILED(result))
{
goto Finished;
}
/* initmemory = 1 for all page file backed shared memory allocators */
result = alloc_initialize(pcache->apalloc, pcache->islocal, "FILELIST_SEGMENT", cachekey, pcache->apfilemap->mapaddr, segsize, 1 TSRMLS_CC);
if(FAILED(result))
{
goto Finished;
}
/* Get memory for cache header */
msize = sizeof(aplist_header) + ((filecount - 1) * sizeof(size_t));
pcache->apheader = (aplist_header *)alloc_get_cacheheader(pcache->apalloc, msize, CACHE_TYPE_FILELIST);
if(pcache->apheader == NULL)
{
result = FATAL_FCACHE_INITIALIZE;
goto Finished;
}
header = pcache->apheader;
/* Create reader writer locks for the aplist */
result = lock_create(&pcache->aprwlock);
if(FAILED(result))
{
goto Finished;
}
result = lock_initialize(pcache->aprwlock, "FILELIST_CACHE", cachekey, locktype, LOCK_USET_SREAD_XWRITE, &header->rdcount TSRMLS_CC);
if(FAILED(result))
{
goto Finished;
}
/* Create resolve path cache for global aplist cache */
if(apctype == APLIST_TYPE_GLOBAL)
{
result = rplist_create(&pcache->prplist);
if(FAILED(result))
{
goto Finished;
}
result = rplist_initialize(pcache->prplist, pcache->islocal, isfirst, cachekey, filecount TSRMLS_CC);
if(FAILED(result))
{
goto Finished;
}
/* If file change notification is enabled, create fcnotify_context */
if(WCG(fcndetect))
{
result = fcnotify_create(&pcache->pnotify);
if(FAILED(result))
{
goto Finished;
}
/* Number of folders on which listeners will be active will */
/* be very small. Using filecount as 32 so that scavenger is quick */
result = fcnotify_initialize(pcache->pnotify, pcache->islocal, pcache, pcache->apalloc, 32 TSRMLS_CC);
if(FAILED(result))
{
goto Finished;
}
}
}
/* Initialize the aplist_header if this is the first process */
if(pcache->islocal || isfirst)
{
if (initmemory)
{
/* No need to get a write lock as other processes */
/* are blocked waiting for hinitdone event */
/* Initialize resolve path cache header */
if(pcache->prplist != NULL)
{
rplist_initheader(pcache->prplist, filecount);
}
if(pcache->pnotify != NULL)
{
fcnotify_initheader(pcache->pnotify, 32);
}
cticks = GetTickCount();
/* We can set rdcount to 0 safely as other processes are */
/* blocked and this process is right now not using lock */
header->mapcount = 1;
header->init_ticks = cticks;
header->rdcount = 0;
header->itemcount = 0;
_ASSERT(filecount > PER_RUN_SCAVENGE_COUNT);
/* Calculate scavenger frequency if ttlmax is not 0 */
if(ttlmax != 0)
{
header->ttlmax = ttlmax * 1000;
header->scfreq = header->ttlmax/(filecount/PER_RUN_SCAVENGE_COUNT);
header->lscavenge = cticks;
header->scstart = 0;
_ASSERT(header->scfreq > 0);
}
header->valuecount = filecount;
memset((void *)header->values, 0, sizeof(size_t) * filecount);
ReleaseMutex(pcache->hinitdone);
islocked = 0;
}
}
else
{
/* Increment the mapcount */
InterlockedIncrement(&header->mapcount);
}
/* Keep fchangefreq in aplist_context */
pcache->fchangefreq = fchangefreq * 1000;
Finished:
if (islocked)
{
ReleaseMutex(pcache->hinitdone);
islocked = 0;
}
if (prefix != NULL)
{
alloc_pefree(prefix);
prefix = NULL;
}
if(FAILED(result))
{
dprintimportant("failure %d in aplist_initialize", result);
/* Must cleanup in exactly reverse order of creation. */
if(pcache->hinitdone != NULL)
{
CloseHandle(pcache->hinitdone);
pcache->hinitdone = NULL;
}
if(pcache->pnotify != NULL)
{
fcnotify_terminate(pcache->pnotify);
fcnotify_destroy(pcache->pnotify);
pcache->pnotify = NULL;
}
if(pcache->prplist != NULL)
{