handle.c File Reference

#include "config.h"
#include "ws2tcpip.h"
#include <stdarg.h>
#include "windef.h"
#include "winbase.h"
#include "winhttp.h"
#include "wine/debug.h"
#include "winhttp_private.h"

Include dependency graph for handle.c:

Go to the source code of this file.

Macros
#define	HANDLE_CHUNK_SIZE   0x10

Functions
	WINE_DEFAULT_DEBUG_CHANNEL (winhttp)
struct object_header *	addref_object (struct object_header *hdr)
struct object_header *	grab_object (HINTERNET hinternet)
void	release_object (struct object_header *hdr)
HINTERNET	alloc_handle (struct object_header *hdr)
BOOL	free_handle (HINTERNET hinternet)

Variables
static CRITICAL_SECTION	handle_cs = { &handle_cs_debug, -1, 0, 0, 0, 0 }
static CRITICAL_SECTION_DEBUG	handle_cs_debug
static struct object_header **	handles
static ULONG_PTR	next_handle
static ULONG_PTR	max_handles

Macro Definition Documentation

HANDLE_CHUNK_SIZE

#define HANDLE_CHUNK_SIZE   0x10

Definition at line 34 of file handle.c.

Function Documentation

addref_object()

struct object_header * addref_object

(

struct object_header *

hdr

)

Definition at line 49 of file handle.c.

{
    ULONG refs = InterlockedIncrement( &hdr->refs );
    TRACE("%p -> refcount = %d\n", hdr, refs);
    return hdr;
}

Referenced by alloc_handle(), grab_object(), WinHttpConnect(), WinHttpOpenRequest(), WinHttpQueryDataAvailable(), WinHttpReadData(), WinHttpReceiveResponse(), WinHttpSendRequest(), and WinHttpWriteData().

alloc_handle()

HINTERNET alloc_handle

(

struct object_header *

hdr

)

Definition at line 88 of file handle.c.

{
    struct object_header **p;
    ULONG_PTR handle, num;
 
    list_init( &hdr->children );
    hdr->handle = NULL;
 
    EnterCriticalSection( &handle_cs );
    if (!max_handles)
    {
        num = HANDLE_CHUNK_SIZE;
        if (!(p = heap_alloc_zero( sizeof(ULONG_PTR) * num ))) goto end;
        handles = p;
        max_handles = num;
    }
    if (max_handles == next_handle)
    {
        num = max_handles * 2;
        if (!(p = heap_realloc_zero( handles, sizeof(ULONG_PTR) * num ))) goto end;
        handles = p;
        max_handles = num;
    }
    handle = next_handle;
    if (handles[handle]) ERR("handle isn't free but should be\n");
 
    handles[handle] = addref_object( hdr );
    hdr->handle = (HINTERNET)(handle + 1);
    while ((next_handle < max_handles) && handles[next_handle]) next_handle++;
 
end:
    LeaveCriticalSection( &handle_cs );
    return hdr->handle;
}

free_handle()

BOOL free_handle

(

HINTERNET

hinternet

)

Definition at line 123 of file handle.c.

{
    BOOL ret = FALSE;
    ULONG_PTR handle = (ULONG_PTR)hinternet;
    struct object_header *hdr = NULL, *child, *next;
 
    EnterCriticalSection( &handle_cs );
 
    if ((handle > 0) && (handle <= max_handles))
    {
        handle--;
        if (handles[handle])
        {
            hdr = handles[handle];
            TRACE("destroying handle 0x%lx for object %p\n", handle + 1, hdr);
            handles[handle] = NULL;
            ret = TRUE;
        }
    }
 
    LeaveCriticalSection( &handle_cs );
 
    if (hdr)
    {
        LIST_FOR_EACH_ENTRY_SAFE( child, next, &hdr->children, struct object_header, entry )
        {
            TRACE("freeing child handle %p for parent handle 0x%lx\n", child->handle, handle + 1);
            free_handle( child->handle );
        }
        release_object( hdr );
    }
 
    EnterCriticalSection( &handle_cs );
    if (next_handle > handle && !handles[handle]) next_handle = handle;
    LeaveCriticalSection( &handle_cs );
 
    return ret;
}

Referenced by free_handle(), pqInsert(), and WinHttpCloseHandle().

grab_object()

struct object_header * grab_object

(

HINTERNET

hinternet

)

Definition at line 56 of file handle.c.

{
    struct object_header *hdr = NULL;
    ULONG_PTR handle = (ULONG_PTR)hinternet;
 
    EnterCriticalSection( &handle_cs );
 
    if ((handle > 0) && (handle <= max_handles) && handles[handle - 1])
        hdr = addref_object( handles[handle - 1] );
 
    LeaveCriticalSection( &handle_cs );
 
    TRACE("handle 0x%lx -> %p\n", handle, hdr);
    return hdr;
}

Referenced by WinHttpAddRequestHeaders(), WinHttpCloseHandle(), WinHttpConnect(), WinHttpGetProxyForUrl(), WinHttpOpenRequest(), WinHttpQueryAuthSchemes(), WinHttpQueryDataAvailable(), WinHttpQueryHeaders(), WinHttpQueryOption(), WinHttpReadData(), WinHttpReceiveResponse(), WinHttpSendRequest(), WinHttpSetCredentials(), WinHttpSetOption(), WinHttpSetStatusCallback(), WinHttpSetTimeouts(), and WinHttpWriteData().

release_object()

void release_object

(

struct object_header *

hdr

)

Definition at line 72 of file handle.c.

{
    ULONG refs = InterlockedDecrement( &hdr->refs );
    TRACE("object %p refcount = %d\n", hdr, refs);
    if (!refs)
    {
        if (hdr->type == WINHTTP_HANDLE_TYPE_REQUEST) close_connection( (struct request *)hdr );
 
        send_callback( hdr, WINHTTP_CALLBACK_STATUS_HANDLE_CLOSING, &hdr->handle, sizeof(HINTERNET) );
 
        TRACE("destroying object %p\n", hdr);
        if (hdr->type != WINHTTP_HANDLE_TYPE_SESSION) list_remove( &hdr->entry );
        hdr->vtbl->destroy( hdr );
    }
}

Referenced by connect_destroy(), free_handle(), request_destroy(), task_proc(), WinHttpAddRequestHeaders(), WinHttpCloseHandle(), WinHttpConnect(), WinHttpGetProxyForUrl(), WinHttpOpen(), WinHttpOpenRequest(), WinHttpQueryAuthSchemes(), WinHttpQueryDataAvailable(), WinHttpQueryHeaders(), WinHttpQueryOption(), WinHttpReadData(), WinHttpReceiveResponse(), WinHttpSendRequest(), WinHttpSetCredentials(), WinHttpSetOption(), WinHttpSetStatusCallback(), WinHttpSetTimeouts(), and WinHttpWriteData().

WINE_DEFAULT_DEBUG_CHANNEL()

WINE_DEFAULT_DEBUG_CHANNEL

(

winhttp

)

Variable Documentation

handle_cs

static CRITICAL_SECTION handle_cs = { &handle_cs_debug, -1, 0, 0, 0, 0 }

static

Definition at line 36 of file handle.c.

Referenced by alloc_handle(), free_handle(), and grab_object().

handle_cs_debug

CRITICAL_SECTION_DEBUG handle_cs_debug

static

Initial value:

=
{
    0, 0, &handle_cs,
    { &handle_cs_debug.ProcessLocksList, &handle_cs_debug.ProcessLocksList },
      0, 0, { (ULONG_PTR)(__FILE__ ": handle_cs") }
}

Definition at line 37 of file handle.c.

handles

struct object_header** handles

static

Definition at line 45 of file handle.c.

Referenced by alloc_handle(), free_handle(), and grab_object().

max_handles

ULONG_PTR max_handles

static

Definition at line 47 of file handle.c.

Referenced by alloc_handle(), free_handle(), and grab_object().

next_handle

ULONG_PTR next_handle

static

Definition at line 46 of file handle.c.

Referenced by alloc_handle(), and free_handle().