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- /* Copyright (C) 2014 Stony Brook University
- This file is part of Graphene Library OS.
- Graphene Library OS is free software: you can redistribute it and/or
- modify it under the terms of the GNU Lesser General Public License
- as published by the Free Software Foundation, either version 3 of the
- License, or (at your option) any later version.
- Graphene Library OS is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU Lesser General Public License for more details.
- You should have received a copy of the GNU Lesser General Public License
- along with this program. If not, see <http://www.gnu.org/licenses/>. */
- /*
- * pal_host.h
- *
- * This file contains definition of PAL host ABI.
- */
- #ifndef PAL_HOST_H
- #define PAL_HOST_H
- #ifndef IN_PAL
- # error "cannot be included outside PAL"
- #endif
- #include <atomic.h>
- /* Simpler mutex design: a single variable that tracks whether the
- * mutex is locked (just waste a 64 bit word for now). State is 1 (locked) or
- * 0 (unlocked).
- * Keep a count of how many threads are waiting on the mutex.
- * If DEBUG_MUTEX is defined,
- * mutex_handle will record the owner of mutex locking. */
- typedef struct mutex_handle {
- volatile int64_t locked;
- struct atomic_int nwaiters;
- #ifdef DEBUG_MUTEX
- int owner;
- #endif
- } PAL_LOCK;
- /* Initializer of Mutexes */
- #define MUTEX_HANDLE_INIT { .locked = 0, .nwaiters.counter = 0 }
- #define INIT_MUTEX_HANDLE(m) do { (m)->locked = 0; atomic_set(&(m)->nwaiters, 0); } while (0)
- #define LOCK_INIT MUTEX_HANDLE_INIT
- #define INIT_LOCK(lock) INIT_MUTEX_HANDLE(lock)
- /* Locking and unlocking of Mutexes */
- int _DkMutexLock(struct mutex_handle* mut);
- int _DkMutexLockTimeout(struct mutex_handle* mut, int64_t timeout_us);
- int _DkMutexUnlock(struct mutex_handle* mut);
- typedef struct {
- PAL_HDR hdr;
- } PAL_RESERVED_HDR;
- typedef struct pal_handle
- {
- /* TSAI: Here we define the internal types of PAL_HANDLE
- * in PAL design, user has not to access the content inside the
- * handle, also there is no need to allocate the internal
- * handles, so we hide the type name of these handles on purpose.
- */
- PAL_HDR hdr;
- union {
- struct {
- PAL_IDX fds[MAX_FDS];
- } generic;
- struct {
- PAL_IDX fd;
- PAL_STR realpath;
- /*
- * map_start is to request this file should be mapped to this
- * address. When fork is emulated, the address is already
- * determined by parent process.
- */
- PAL_PTR map_start;
- } file;
- struct {
- PAL_IDX fd;
- PAL_NUM pipeid;
- PAL_BOL nonblocking;
- } pipe;
- struct {
- PAL_IDX fds[MAX_FDS];
- PAL_BOL nonblocking;
- } pipeprv;
- struct {
- PAL_IDX fd;
- /* TODO: add other flags in future, if needed (e.g., semaphore) */
- PAL_BOL nonblocking;
- } eventfd;
- struct {
- PAL_IDX fd_in, fd_out;
- PAL_IDX dev_type;
- PAL_BOL destroy;
- PAL_STR realpath;
- } dev;
- struct {
- PAL_IDX fd;
- PAL_STR realpath;
- PAL_PTR buf;
- PAL_PTR ptr;
- PAL_PTR end;
- PAL_BOL endofstream;
- } dir;
- struct {
- PAL_IDX fd;
- PAL_PTR bind;
- PAL_PTR conn;
- PAL_BOL nonblocking;
- PAL_BOL reuseaddr;
- PAL_NUM linger;
- PAL_NUM receivebuf;
- PAL_NUM sendbuf;
- PAL_NUM receivetimeout;
- PAL_NUM sendtimeout;
- PAL_BOL tcp_cork;
- PAL_BOL tcp_keepalive;
- PAL_BOL tcp_nodelay;
- } sock;
- struct {
- PAL_IDX stream;
- PAL_IDX cargo;
- PAL_IDX pid;
- PAL_BOL nonblocking;
- } process;
- struct {
- PAL_IDX tid;
- PAL_PTR stack;
- } thread;
- struct {
- struct mutex_handle mut;
- } mutex;
- struct {
- struct atomic_int signaled;
- struct atomic_int nwaiters;
- PAL_BOL isnotification;
- } event;
- };
- } * PAL_HANDLE;
- #define RFD(n) (1 << (MAX_FDS*0 + (n)))
- #define WFD(n) (1 << (MAX_FDS*1 + (n)))
- #define ERROR(n) (1 << (MAX_FDS*2 + (n)))
- #define HANDLE_TYPE(handle) ((handle)->hdr.type)
- extern void __check_pending_event (void);
- #define LEAVE_PAL_CALL() do { __check_pending_event(); } while (0)
- #define LEAVE_PAL_CALL_RETURN(retval) \
- do { __check_pending_event(); return (retval); } while (0)
- #endif /* PAL_HOST_H */
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