libdispatch-913.30.4.tar.gz

[apple/libdispatch.git] / src / io_internal.h

diff --git a/src/io_internal.h b/src/io_internal.h
index fbb27c570af6bb74e59df9a6048d866043ffc9e9..672727fae6f574f0343f428b28a518804712f56e 100644 (file)
--- a/src/io_internal.h
+++ b/src/io_internal.h
@@ -35,11 +35,15 @@
 #define _DISPATCH_IO_LABEL_SIZE 16
 
 #if TARGET_OS_EMBEDDED // rdar://problem/9032036
-#define DIO_MAX_CHUNK_PAGES                            128u //  512kB chunk size
+#define DIO_MAX_CHUNK_SIZE                             (512u * 1024)
+#define DIO_HASH_SIZE                                  64u  // must be a power of two
 #else
-#define DIO_MAX_CHUNK_PAGES                            256u // 1024kB chunk size
+#define DIO_MAX_CHUNK_SIZE                             (1024u * 1024)
+#define DIO_HASH_SIZE                                  256u // must be a power of two
 #endif
 
+#define DIO_HASH(x) ((uintptr_t)(x) & (DIO_HASH_SIZE - 1))
+
 #define DIO_DEFAULT_LOW_WATER_CHUNKS     1u // default low-water mark
 #define DIO_MAX_PENDING_IO_REQS                          6u // Pending I/O read advises
 
@@ -62,8 +66,8 @@ typedef unsigned int dispatch_op_flags_t;
 #define DIO_CLOSED             1u // channel has been closed
 #define DIO_STOPPED            2u // channel has been stopped (implies closed)
 
-DISPATCH_DECL_INTERNAL(dispatch_operation);
-DISPATCH_DECL_INTERNAL(dispatch_disk);
+DISPATCH_INTERNAL_CLASS_DECL(operation);
+DISPATCH_INTERNAL_CLASS_DECL(disk);
 
 struct dispatch_stream_s {
        dispatch_queue_t dq;
@@ -90,10 +94,8 @@ struct dispatch_stat_s {
        mode_t mode;
 };
 
-DISPATCH_CLASS_DECL(disk);
 struct dispatch_disk_s {
-       DISPATCH_STRUCT_HEADER(disk);
-       dev_t dev;
+       DISPATCH_OBJECT_HEADER(disk);
        TAILQ_HEAD(dispatch_disk_operations_s, dispatch_operation_s) operations;
        dispatch_operation_t cur_rq;
        dispatch_queue_t pick_queue;
@@ -101,8 +103,8 @@ struct dispatch_disk_s {
        size_t free_idx;
        size_t req_idx;
        size_t advise_idx;
+       dev_t dev;
        bool io_active;
-       int err;
        TAILQ_ENTRY(dispatch_disk_s) disk_list;
        size_t advise_list_depth;
        dispatch_operation_t advise_list[];
@@ -138,9 +140,8 @@ typedef struct dispatch_io_param_s {
        unsigned long interval_flags;
 } dispatch_io_param_s;
 
-DISPATCH_CLASS_DECL(operation);
 struct dispatch_operation_s {
-       DISPATCH_STRUCT_HEADER(operation);
+       DISPATCH_OBJECT_HEADER(operation);
        dispatch_queue_t op_q;
        dispatch_op_direction_t direction; // READ OR WRITE
        dispatch_io_param_s params;
@@ -164,7 +165,7 @@ struct dispatch_operation_s {
 
 DISPATCH_CLASS_DECL(io);
 struct dispatch_io_s {
-       DISPATCH_STRUCT_HEADER(io);
+       DISPATCH_OBJECT_HEADER(io);
        dispatch_queue_t queue, barrier_queue;
        dispatch_group_t barrier_group;
        dispatch_io_param_s params;
@@ -177,10 +178,11 @@ struct dispatch_io_s {
 
 void _dispatch_io_set_target_queue(dispatch_io_t channel, dispatch_queue_t dq);
 size_t _dispatch_io_debug(dispatch_io_t channel, char* buf, size_t bufsiz);
-void _dispatch_io_dispose(dispatch_io_t channel);
+void _dispatch_io_dispose(dispatch_io_t channel, bool *allow_free);
 size_t _dispatch_operation_debug(dispatch_operation_t op, char* buf,
                size_t bufsiz);
-void _dispatch_operation_dispose(dispatch_operation_t operation);
-void _dispatch_disk_dispose(dispatch_disk_t disk);
+void _dispatch_operation_dispose(dispatch_operation_t operation,
+               bool *allow_free);
+void _dispatch_disk_dispose(dispatch_disk_t disk, bool *allow_free);
 
 #endif // __DISPATCH_IO_INTERNAL__