Skip to content
Navigation Menu
Toggle navigation
Sign in
In this repository
All GitHub Enterprise
↵
Jump to
↵
No suggested jump to results
In this repository
All GitHub Enterprise
↵
Jump to
↵
In this organization
All GitHub Enterprise
↵
Jump to
↵
In this repository
All GitHub Enterprise
↵
Jump to
↵
Sign in
Reseting focus
You signed in with another tab or window.
Reload
to refresh your session.
You signed out in another tab or window.
Reload
to refresh your session.
You switched accounts on another tab or window.
Reload
to refresh your session.
Dismiss alert
{{ message }}
mariux64
/
linux
Public
Notifications
You must be signed in to change notification settings
Fork
0
Star
0
Code
Issues
2
Pull requests
0
Actions
Projects
0
Wiki
Security
Insights
Additional navigation options
Code
Issues
Pull requests
Actions
Projects
Wiki
Security
Insights
Files
75659ca
Documentation
arch
block
crypto
drivers
fs
include
acpi
asm-alpha
asm-arm
asm-avr32
asm-blackfin
asm-cris
asm-frv
asm-generic
asm-h8300
asm-ia64
asm-m32r
asm-m68k
asm-m68knommu
asm-mips
asm-parisc
asm-powerpc
asm-ppc
asm-s390
asm-sh
asm-sparc
asm-sparc64
asm-um
asm-v850
asm-x86
asm-xtensa
crypto
keys
linux
amba
byteorder
can
dvb
hdlc
i2c
isdn
lockd
mlx4
mmc
mtd
netfilter
netfilter_arp
netfilter_bridge
netfilter_ipv4
netfilter_ipv6
nfsd
raid
rtc
spi
ssb
sunrpc
tc_act
tc_ematch
usb
8250_pci.h
Kbuild
a.out.h
ac97_codec.h
acct.h
acpi.h
acpi_pmtmr.h
adb.h
adfs_fs.h
adfs_fs_i.h
adfs_fs_sb.h
aer.h
affs_hardblocks.h
agp_backend.h
agpgart.h
aio.h
aio_abi.h
amifd.h
amifdreg.h
amigaffs.h
anon_inodes.h
apm-emulation.h
apm_bios.h
arcdevice.h
arcfb.h
async_tx.h
ata.h
atalk.h
atm.h
atm_eni.h
atm_he.h
atm_idt77105.h
atm_nicstar.h
atm_suni.h
atm_tcp.h
atm_zatm.h
atmapi.h
atmarp.h
atmbr2684.h
atmclip.h
atmdev.h
atmel-ssc.h
atmel_pdc.h
atmioc.h
atmlec.h
atmmpc.h
atmppp.h
atmsap.h
atmsvc.h
attribute_container.h
audit.h
auto_fs.h
auto_fs4.h
auxvec.h
ax25.h
b1lli.h
b1pcmcia.h
backing-dev.h
backlight.h
baycom.h
bcd.h
bfs_fs.h
binfmts.h
bio.h
bit_spinlock.h
bitmap.h
bitops.h
bitrev.h
blkdev.h
blkpg.h
blktrace_api.h
blockgroup_lock.h
bootmem.h
bottom_half.h
bpqether.h
bsg.h
buffer_head.h
bug.h
cache.h
calc64.h
can.h
capability.h
capi.h
cciss_ioctl.h
cd1400.h
cdev.h
cdk.h
cdrom.h
cfag12864b.h
cgroup.h
cgroup_subsys.h
cgroupstats.h
chio.h
circ_buf.h
clk.h
clockchips.h
clocksource.h
cm4000_cs.h
cn_proc.h
coda.h
coda_cache.h
coda_fs_i.h
coda_linux.h
coda_psdev.h
coff.h
com20020.h
compat.h
compiler-gcc.h
compiler-gcc3.h
compiler-gcc4.h
compiler-intel.h
compiler.h
completion.h
comstats.h
concap.h
configfs.h
connector.h
console.h
console_struct.h
consolemap.h
const.h
cpu.h
cpufreq.h
cpuidle.h
cpumask.h
cpuset.h
cramfs_fs.h
cramfs_fs_sb.h
crash_dump.h
crc-ccitt.h
crc-itu-t.h
crc16.h
crc32.h
crc32c.h
crc7.h
crypto.h
cryptohash.h
ctype.h
cuda.h
cyclades.h
cyclomx.h
cycx_cfm.h
cycx_drv.h
cycx_x25.h
dca.h
dcache.h
dccp.h
dcookies.h
debug_locks.h
debugfs.h
delay.h
delayacct.h
device-mapper.h
device.h
devpts_fs.h
dio.h
dirent.h
display.h
dlm.h
dlm_device.h
dlm_netlink.h
dlmconstants.h
dm-ioctl.h
dm9000.h
dma-mapping.h
dmaengine.h
dmapool.h
dmar.h
dmi.h
dn.h
dnotify.h
dqblk_v1.h
dqblk_v2.h
dqblk_xfs.h
ds1286.h
ds17287rtc.h
ds1wm.h
dtlk.h
edac.h
edd.h
eeprom_93cx6.h
efi.h
efs_dir.h
efs_fs.h
efs_fs_i.h
efs_fs_sb.h
efs_vh.h
eisa.h
elevator.h
elf-em.h
elf-fdpic.h
elf.h
elfcore-compat.h
elfcore.h
elfnote.h
err.h
errno.h
errqueue.h
etherdevice.h
ethtool.h
eventfd.h
eventpoll.h
exportfs.h
ext2_fs.h
ext2_fs_sb.h
ext3_fs.h
ext3_fs_i.h
ext3_fs_sb.h
ext3_jbd.h
ext4_fs.h
ext4_fs_extents.h
ext4_fs_i.h
ext4_fs_sb.h
ext4_jbd2.h
f75375s.h
fadvise.h
falloc.h
fault-inject.h
fb.h
fcdevice.h
fcntl.h
fd.h
fd1772.h
fddidevice.h
fdreg.h
fib_rules.h
file.h
filter.h
firewire-cdev.h
firewire-constants.h
firmware.h
flat.h
font.h
freezer.h
fs.h
fs_enet_pd.h
fs_stack.h
fs_struct.h
fs_uart_pd.h
fsl_devices.h
fsnotify.h
fuse.h
futex.h
gameport.h
gen_stats.h
genalloc.h
generic_acl.h
generic_serial.h
genetlink.h
genhd.h
getcpu.h
gfp.h
gfs2_ondisk.h
gigaset_dev.h
gpio_keys.h
gpio_mouse.h
hardirq.h
harrier_defs.h
hash.h
hayesesp.h
hdlc.h
hdlcdrv.h
hdpu_features.h
hdreg.h
hdsmart.h
hid-debug.h
hid.h
hiddev.h
hidraw.h
highmem.h
highuid.h
hil.h
hil_mlc.h
hippidevice.h
hp_sdc.h
hpet.h
hrtimer.h
htirq.h
hugetlb.h
hw_random.h
hwmon-sysfs.h
hwmon-vid.h
hwmon.h
hysdn_if.h
i2c-algo-bit.h
i2c-algo-pca.h
i2c-algo-pcf.h
i2c-algo-sgi.h
i2c-dev.h
i2c-gpio.h
i2c-id.h
i2c-ocores.h
i2c-pnx.h
i2c-pxa.h
i2c.h
i2o-dev.h
i2o.h
i8042.h
i8k.h
ibmtr.h
icmp.h
icmpv6.h
ide.h
idr.h
ieee80211.h
if.h
if_addr.h
if_addrlabel.h
if_arcnet.h
if_arp.h
if_bonding.h
if_bridge.h
if_cablemodem.h
if_ec.h
if_eql.h
if_ether.h
if_fc.h
if_fddi.h
if_frad.h
if_hippi.h
if_infiniband.h
if_link.h
if_ltalk.h
if_macvlan.h
if_packet.h
if_plip.h
if_ppp.h
if_pppol2tp.h
if_pppox.h
if_slip.h
if_strip.h
if_tr.h
if_tun.h
if_tunnel.h
if_vlan.h
if_wanpipe.h
igmp.h
in.h
in6.h
in_route.h
inet.h
inet_diag.h
inet_lro.h
inetdevice.h
init.h
init_ohci1394_dma.h
init_task.h
initrd.h
inotify.h
input-polldev.h
input.h
interrupt.h
io.h
ioc3.h
ioc4.h
iocontext.h
ioctl.h
ioport.h
ioprio.h
ip.h
ip6_tunnel.h
ipc.h
ipmi.h
ipmi_msgdefs.h
ipmi_smi.h
ipsec.h
ipv6.h
ipv6_route.h
ipx.h
irda.h
irq.h
irq_cpustat.h
irqflags.h
irqreturn.h
isa.h
isapnp.h
isdn.h
isdn_divertif.h
isdn_ppp.h
isdnif.h
isicom.h
iso_fs.h
istallion.h
ivtv.h
ivtvfb.h
ixjuser.h
jbd.h
jbd2.h
jffs2.h
jhash.h
jiffies.h
journal-head.h
joystick.h
kallsyms.h
kbd_diacr.h
kbd_kern.h
kd.h
kdebug.h
kdev_t.h
kernel.h
kernel_stat.h
kernelcapi.h
kexec.h
key-type.h
key-ui.h
key.h
keyboard.h
keyctl.h
kfifo.h
klist.h
kmalloc_sizes.h
kmod.h
kobj_map.h
kobject.h
kprobes.h
kref.h
ks0108.h
kthread.h
ktime.h
kvm.h
kvm_host.h
kvm_para.h
kvm_types.h
lapb.h
latency.h
latencytop.h
lcd.h
leds.h
lguest.h
lguest_launcher.h
libata.h
libps2.h
license.h
limits.h
linkage.h
linux_logo.h
list.h
llc.h
lm_interface.h
lock_dlm_plock.h
lockdep.h
log2.h
loop.h
lp.h
lzo.h
m48t86.h
magic.h
major.h
maple.h
marker.h
matroxfb.h
mbcache.h
mc146818rtc.h
mc6821.h
mca-legacy.h
mca.h
mdio-bitbang.h
memory.h
memory_hotplug.h
mempolicy.h
mempool.h
meye.h
migrate.h
mii.h
minix_fs.h
miscdevice.h
mm.h
mm_inline.h
mm_types.h
mman.h
mmtimer.h
mmzone.h
mnt_namespace.h
mod_devicetable.h
module.h
moduleloader.h
moduleparam.h
mount.h
mpage.h
mqueue.h
mroute.h
msdos_fs.h
msg.h
msi.h
mtio.h
mutex-debug.h
mutex.h
mv643xx.h
mv643xx_eth.h
mv643xx_i2c.h
n_r3964.h
namei.h
nbd.h
ncp.h
ncp_fs.h
ncp_fs_i.h
ncp_fs_sb.h
ncp_mount.h
ncp_no.h
neighbour.h
net.h
netdevice.h
netfilter.h
netfilter_arp.h
netfilter_bridge.h
netfilter_decnet.h
netfilter_ipv4.h
netfilter_ipv6.h
netlink.h
netpoll.h
netrom.h
nfs.h
nfs2.h
nfs3.h
nfs4.h
nfs4_acl.h
nfs4_mount.h
nfs_fs.h
nfs_fs_i.h
nfs_fs_sb.h
nfs_idmap.h
nfs_mount.h
nfs_page.h
nfs_xdr.h
nfsacl.h
nfsd_idmap.h
nl80211.h
nls.h
nmi.h
node.h
nodemask.h
notifier.h
nsc_gpio.h
nsproxy.h
nubus.h
numa.h
nvram.h
of.h
of_device.h
of_platform.h
oom.h
oprofile.h
page-flags.h
page-isolation.h
pageblock-flags.h
pagemap.h
pagevec.h
param.h
parport.h
parport_pc.h
parser.h
pata_platform.h
patchkey.h
pci-acpi.h
pci.h
pci_hotplug.h
pci_ids.h
pci_regs.h
pcieport_if.h
pcounter.h
pda_power.h
percpu.h
percpu_counter.h
personality.h
pfkeyv2.h
pfn.h
pg.h
phantom.h
phonedev.h
phy.h
phy_fixed.h
pid.h
pid_namespace.h
pipe_fs_i.h
pkt_cls.h
pkt_sched.h
pktcdvd.h
platform_device.h
plist.h
pm.h
pm_legacy.h
pmu.h
pnp.h
pnpbios.h
poison.h
poll.h
posix-timers.h
posix_acl.h
posix_acl_xattr.h
posix_types.h
power_supply.h
ppdev.h
ppp-comp.h
ppp_channel.h
ppp_defs.h
prctl.h
preempt.h
prefetch.h
prio_heap.h
prio_tree.h
proc_fs.h
profile.h
proportions.h
ps2esdi.h
ptrace.h
qnx4_fs.h
qnxtypes.h
quicklist.h
quota.h
quotaio_v1.h
quotaio_v2.h
quotaops.h
radeonfb.h
radix-tree.h
raid_class.h
ramfs.h
random.h
raw.h
rbtree.h
rcuclassic.h
rcupdate.h
rcupreempt.h
rcupreempt_trace.h
reboot.h
reciprocal_div.h
regset.h
reiserfs_acl.h
reiserfs_fs.h
reiserfs_fs_i.h
reiserfs_fs_sb.h
reiserfs_xattr.h
relay.h
resource.h
resume-trace.h
rfkill.h
rio.h
rio_drv.h
rio_ids.h
rio_regs.h
rmap.h
romfs_fs.h
root_dev.h
rose.h
route.h
rslib.h
rtc-v3020.h
rtc.h
rtmutex.h
rtnetlink.h
rwsem-spinlock.h
rwsem.h
rxrpc.h
sc26198.h
scatterlist.h
scc.h
sched.h
screen_info.h
sctp.h
scx200.h
scx200_gpio.h
sdla.h
seccomp.h
securebits.h
security.h
selection.h
selinux.h
selinux_netlink.h
sem.h
seq_file.h
seqlock.h
serial.h
serial167.h
serialP.h
serial_8250.h
serial_core.h
serial_pnx8xxx.h
serial_reg.h
serio.h
shm.h
shmem_fs.h
signal.h
signalfd.h
skbuff.h
slab.h
slab_def.h
slob_def.h
slub_def.h
sm501-regs.h
sm501.h
smb.h
smb_fs.h
smb_fs_i.h
smb_fs_sb.h
smb_mount.h
smbno.h
smp.h
smp_lock.h
snmp.h
socket.h
sockios.h
som.h
sonet.h
sony-laptop.h
sonypi.h
sort.h
sound.h
soundcard.h
spinlock.h
spinlock_api_smp.h
spinlock_api_up.h
spinlock_types.h
spinlock_types_up.h
spinlock_up.h
splice.h
srcu.h
stacktrace.h
stallion.h
start_kernel.h
stat.h
statfs.h
stddef.h
stop_machine.h
string.h
stringify.h
superhyway.h
suspend.h
svga.h
swap.h
swapops.h
synclink.h
sys.h
syscalls.h
sysctl.h
sysdev.h
sysfs.h
sysrq.h
sysv_fs.h
task_io_accounting.h
task_io_accounting_ops.h
taskstats.h
taskstats_kern.h
tc.h
tcp.h
telephony.h
termios.h
textsearch.h
textsearch_fsm.h
tfrc.h
thread_info.h
threads.h
tick.h
tifm.h
time.h
timer.h
timerfd.h
times.h
timex.h
tiocl.h
tipc.h
tipc_config.h
topology.h
toshiba.h
transport_class.h
trdevice.h
tsacct_kern.h
tty.h
tty_driver.h
tty_flip.h
tty_ldisc.h
types.h
uaccess.h
udf_fs.h
udf_fs_i.h
udf_fs_sb.h
udp.h
ufs_fs.h
uinput.h
uio.h
uio_driver.h
ultrasound.h
un.h
unistd.h
unwind.h
usb.h
usb_usual.h
usbdevice_fs.h
user.h
user_namespace.h
utime.h
uts.h
utsname.h
vermagic.h
veth.h
vfs.h
via.h
video_decoder.h
video_encoder.h
video_output.h
videodev.h
videodev2.h
videotext.h
virtio.h
virtio_9p.h
virtio_blk.h
virtio_config.h
virtio_console.h
virtio_net.h
virtio_ring.h
vmalloc.h
vmstat.h
vt.h
vt_buffer.h
vt_kern.h
wait.h
wanrouter.h
watchdog.h
wireless.h
workqueue.h
writeback.h
x25.h
xattr.h
xfrm.h
xilinxfb.h
yam.h
zconf.h
zlib.h
zorro.h
zorro_ids.h
zutil.h
math-emu
media
mtd
net
pcmcia
rdma
rxrpc
scsi
sound
video
xen
Kbuild
init
ipc
kernel
lib
mm
net
samples
scripts
security
sound
usr
virt
.gitignore
.mailmap
COPYING
CREDITS
Kbuild
MAINTAINERS
Makefile
README
REPORTING-BUGS
Breadcrumbs
linux
/
include
/
linux
/
mutex.h
Blame
Blame
Latest commit
History
History
151 lines (136 loc) · 4.67 KB
Breadcrumbs
linux
/
include
/
linux
/
mutex.h
Top
File metadata and controls
Code
Blame
151 lines (136 loc) · 4.67 KB
Raw
/* * Mutexes: blocking mutual exclusion locks * * started by Ingo Molnar: * * Copyright (C) 2004, 2005, 2006 Red Hat, Inc., Ingo Molnar <mingo@redhat.com> * * This file contains the main data structure and API definitions. */ #ifndef __LINUX_MUTEX_H #define __LINUX_MUTEX_H #include <linux/list.h> #include <linux/spinlock_types.h> #include <linux/linkage.h> #include <linux/lockdep.h> #include <asm/atomic.h> /* * Simple, straightforward mutexes with strict semantics: * * - only one task can hold the mutex at a time * - only the owner can unlock the mutex * - multiple unlocks are not permitted * - recursive locking is not permitted * - a mutex object must be initialized via the API * - a mutex object must not be initialized via memset or copying * - task may not exit with mutex held * - memory areas where held locks reside must not be freed * - held mutexes must not be reinitialized * - mutexes may not be used in hardware or software interrupt * contexts such as tasklets and timers * * These semantics are fully enforced when DEBUG_MUTEXES is * enabled. Furthermore, besides enforcing the above rules, the mutex * debugging code also implements a number of additional features * that make lock debugging easier and faster: * * - uses symbolic names of mutexes, whenever they are printed in debug output * - point-of-acquire tracking, symbolic lookup of function names * - list of all locks held in the system, printout of them * - owner tracking * - detects self-recursing locks and prints out all relevant info * - detects multi-task circular deadlocks and prints out all affected * locks and tasks (and only those tasks) */ struct mutex { /* 1: unlocked, 0: locked, negative: locked, possible waiters */ atomic_t count; spinlock_t wait_lock; struct list_head wait_list; #ifdef CONFIG_DEBUG_MUTEXES struct thread_info *owner; const char *name; void *magic; #endif #ifdef CONFIG_DEBUG_LOCK_ALLOC struct lockdep_map dep_map; #endif }; /* * This is the control structure for tasks blocked on mutex, * which resides on the blocked task's kernel stack: */ struct mutex_waiter { struct list_head list; struct task_struct *task; #ifdef CONFIG_DEBUG_MUTEXES struct mutex *lock; void *magic; #endif }; #ifdef CONFIG_DEBUG_MUTEXES # include <linux/mutex-debug.h> #else # define __DEBUG_MUTEX_INITIALIZER(lockname) # define mutex_init(mutex) \ do { \ static struct lock_class_key __key; \ \ __mutex_init((mutex), #mutex, &__key); \ } while (0) # define mutex_destroy(mutex) do { } while (0) #endif #ifdef CONFIG_DEBUG_LOCK_ALLOC # define __DEP_MAP_MUTEX_INITIALIZER(lockname) \ , .dep_map = { .name = #lockname } #else # define __DEP_MAP_MUTEX_INITIALIZER(lockname) #endif #define __MUTEX_INITIALIZER(lockname) \ { .count = ATOMIC_INIT(1) \ , .wait_lock = __SPIN_LOCK_UNLOCKED(lockname.wait_lock) \ , .wait_list = LIST_HEAD_INIT(lockname.wait_list) \ __DEBUG_MUTEX_INITIALIZER(lockname) \ __DEP_MAP_MUTEX_INITIALIZER(lockname) } #define DEFINE_MUTEX(mutexname) \ struct mutex mutexname = __MUTEX_INITIALIZER(mutexname) extern void __mutex_init(struct mutex *lock, const char *name, struct lock_class_key *key); /** * mutex_is_locked - is the mutex locked * @lock: the mutex to be queried * * Returns 1 if the mutex is locked, 0 if unlocked. */ static inline int fastcall mutex_is_locked(struct mutex *lock) { return atomic_read(&lock->count) != 1; } /* * See kernel/mutex.c for detailed documentation of these APIs. * Also see Documentation/mutex-design.txt. */ #ifdef CONFIG_DEBUG_LOCK_ALLOC extern void mutex_lock_nested(struct mutex *lock, unsigned int subclass); extern int __must_check mutex_lock_interruptible_nested(struct mutex *lock, unsigned int subclass); extern int __must_check mutex_lock_killable_nested(struct mutex *lock, unsigned int subclass); #define mutex_lock(lock) mutex_lock_nested(lock, 0) #define mutex_lock_interruptible(lock) mutex_lock_interruptible_nested(lock, 0) #define mutex_lock_killable(lock) mutex_lock_killable_nested(lock, 0) #else extern void fastcall mutex_lock(struct mutex *lock); extern int __must_check fastcall mutex_lock_interruptible(struct mutex *lock); extern int __must_check fastcall mutex_lock_killable(struct mutex *lock); # define mutex_lock_nested(lock, subclass) mutex_lock(lock) # define mutex_lock_interruptible_nested(lock, subclass) mutex_lock_interruptible(lock) # define mutex_lock_killable_nested(lock, subclass) mutex_lock_killable(lock) #endif /* * NOTE: mutex_trylock() follows the spin_trylock() convention, * not the down_trylock() convention! */ extern int fastcall mutex_trylock(struct mutex *lock); extern void fastcall mutex_unlock(struct mutex *lock); #endif
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
You can’t perform that action at this time.