/***********************************************************************
* add_fd_to_cache
*
* Caller must hold fd_cache_section.
*/
static int add_fd_to_cache( HANDLE handle, int fd, enum server_fd_type type,
unsigned int access, unsigned int options )
{
unsigned int entry, idx = handle_to_index( handle, &entry );
int prev_fd;
if (entry >= FD_CACHE_ENTRIES)
{
FIXME( "too many allocated handles, not caching %p\n", handle );
return 0;
}
if (!fd_cache[entry]) /* do we need to allocate a new block of entries? */
{
if (!entry) fd_cache[0] = fd_cache_initial_block;
else
{
void *ptr = wine_anon_mmap( NULL, FD_CACHE_BLOCK_SIZE * sizeof(struct fd_cache_entry),
PROT_READ | PROT_WRITE, 0 );
if (ptr == MAP_FAILED) return 0;
fd_cache[entry] = ptr;
}
}
/* store fd+1 so that 0 can be used as the unset value */
prev_fd = interlocked_xchg( &fd_cache[entry][idx].fd, fd + 1 ) - 1;
fd_cache[entry][idx].type = type;
fd_cache[entry][idx].access = access;
fd_cache[entry][idx].options = options;
if (prev_fd != -1) close( prev_fd );
return 1;
}
/***********************************************************************
* server_remove_fd_from_cache
*/
int server_remove_fd_from_cache( HANDLE handle )
{
unsigned int entry, idx = handle_to_index( handle, &entry );
int fd = -1;
if (entry < FD_CACHE_ENTRIES && fd_cache[entry])
fd = interlocked_xchg( &fd_cache[entry][idx].fd, 0 ) - 1;
return fd;
}
/***********************************************************************
* get_cached_fd
*
* Caller must hold fd_cache_section.
*/
static inline int get_cached_fd( HANDLE handle, enum server_fd_type *type,
unsigned int *access, unsigned int *options )
{
unsigned int entry, idx = handle_to_index( handle, &entry );
int fd = -1;
if (entry < FD_CACHE_ENTRIES && fd_cache[entry])
{
fd = fd_cache[entry][idx].fd - 1;
if (type) *type = fd_cache[entry][idx].type;
if (access) *access = fd_cache[entry][idx].access;
if (options) *options = fd_cache[entry][idx].options;
}
return fd;
}
/* return a handle entry, or NULL if the handle is invalid */
static struct handle_entry *get_handle( struct process *process, obj_handle_t handle )
{
struct handle_table *table = process->handles;
struct handle_entry *entry;
int index;
if (handle_is_global(handle))
{
handle = handle_global_to_local(handle);
table = global_table;
}
if (!table) return NULL;
index = handle_to_index( handle );
if (index < 0) return NULL;
if (index > table->last) return NULL;
entry = table->entries + index;
if (!entry->ptr) return NULL;
return entry;
}
const GrGLShaderVar& GrGLShaderBuilder::getUniformVariable(UniformHandle u) const {
return fUniforms[handle_to_index(u)].fVariable;
}
