projects / mirror_qemu.git / blame
| Commit | Line | Data |
|---|---|---|
| 1f050a46 SH |
1 | /* |
| 2 | * AioContext POSIX event loop implementation internal APIs | |
| 3 | * | |
| 4 | * Copyright IBM, Corp. 2008 | |
| 5 | * Copyright Red Hat, Inc. 2020 | |
| 6 | * | |
| 7 | * Authors: | |
| 8 | * Anthony Liguori <aliguori@us.ibm.com> | |
| 9 | * | |
| 10 | * This work is licensed under the terms of the GNU GPL, version 2. See | |
| 11 | * the COPYING file in the top-level directory. | |
| 12 | * | |
| 13 | * Contributions after 2012-01-13 are licensed under the terms of the | |
| 14 | * GNU GPL, version 2 or (at your option) any later version. | |
| 15 | */ | |
| 16 | ||
| 17 | #ifndef AIO_POSIX_H | |
| 18 | #define AIO_POSIX_H | |
| 19 | ||
| 20 | #include "block/aio.h" | |
| 21 | ||
| 22 | struct AioHandler { | |
| 23 | GPollFD pfd; | |
| 24 | IOHandler *io_read; | |
| 25 | IOHandler *io_write; | |
| 26 | AioPollFn *io_poll; | |
| 826cc324 | 27 | IOHandler *io_poll_ready; |
| 1f050a46 SH |
28 | IOHandler *io_poll_begin; |
| 29 | IOHandler *io_poll_end; | |
| 30 | void *opaque; | |
| 1f050a46 SH |
31 | QLIST_ENTRY(AioHandler) node; |
| 32 | QLIST_ENTRY(AioHandler) node_ready; /* only used during aio_poll() */ | |
| 33 | QLIST_ENTRY(AioHandler) node_deleted; | |
| d37d0e36 | 34 | QLIST_ENTRY(AioHandler) node_poll; |
| 73fd282e SH |
35 | #ifdef CONFIG_LINUX_IO_URING |
| 36 | QSLIST_ENTRY(AioHandler) node_submitted; | |
| 37 | unsigned flags; /* see fdmon-io_uring.c */ | |
| 38 | #endif | |
| d37d0e36 | 39 | int64_t poll_idle_timeout; /* when to stop userspace polling */ |
| fc879646 | 40 | bool poll_ready; /* has polling detected an event? */ |
| 1f050a46 SH |
41 | }; |
| 42 | ||
| 43 | /* Add a handler to a ready list */ | |
| 44 | void aio_add_ready_handler(AioHandlerList *ready_list, AioHandler *node, | |
| 45 | int revents); | |
| 46 | ||
| 47 | extern const FDMonOps fdmon_poll_ops; | |
| 48 | ||
| 49 | #ifdef CONFIG_EPOLL_CREATE1 | |
| 50 | bool fdmon_epoll_try_upgrade(AioContext *ctx, unsigned npfd); | |
| 51 | void fdmon_epoll_setup(AioContext *ctx); | |
| 52 | void fdmon_epoll_disable(AioContext *ctx); | |
| 53 | #else | |
| 54 | static inline bool fdmon_epoll_try_upgrade(AioContext *ctx, unsigned npfd) | |
| 55 | { | |
| 56 | return false; | |
| 57 | } | |
| 58 | ||
| 59 | static inline void fdmon_epoll_setup(AioContext *ctx) | |
| 60 | { | |
| 61 | } | |
| 62 | ||
| 63 | static inline void fdmon_epoll_disable(AioContext *ctx) | |
| 64 | { | |
| 65 | } | |
| 66 | #endif /* !CONFIG_EPOLL_CREATE1 */ | |
| 67 | ||
| 73fd282e SH |
68 | #ifdef CONFIG_LINUX_IO_URING |
| 69 | bool fdmon_io_uring_setup(AioContext *ctx); | |
| 70 | void fdmon_io_uring_destroy(AioContext *ctx); | |
| 71 | #else | |
| 72 | static inline bool fdmon_io_uring_setup(AioContext *ctx) | |
| 73 | { | |
| 74 | return false; | |
| 75 | } | |
| 76 | ||
| 77 | static inline void fdmon_io_uring_destroy(AioContext *ctx) | |
| 78 | { | |
| 79 | } | |
| 80 | #endif /* !CONFIG_LINUX_IO_URING */ | |
| 81 | ||
| 1f050a46 | 82 | #endif /* AIO_POSIX_H */ |