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Kernel: Clean up sys$futex and add support for cross-process futexes

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Idan Horowitz 2022-07-14 01:25:35 +03:00 • committed by Andreas Kling
parent 55c7496200
commit 9db10887a1
9 changed files with 164 additions and 70 deletions
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8
Userland/Libraries/LibC/serenity.h
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@ -27,7 +27,7 @@ int futex(uint32_t* userspace_address, int futex_op, uint32_t value, const struc
# define ALWAYS_INLINE_SERENITY_H
#endif
static ALWAYS_INLINE int futex_wait(uint32_t* userspace_address, uint32_t value, const struct timespec* abstime, int clockid)
static ALWAYS_INLINE int futex_wait(uint32_t* userspace_address, uint32_t value, const struct timespec* abstime, int clockid, int process_shared)
{
int op;
@ -39,12 +39,12 @@ static ALWAYS_INLINE int futex_wait(uint32_t* userspace_address, uint32_t value,
} else {
op = FUTEX_WAIT;
}
return futex(userspace_address, op, value, abstime, NULL, FUTEX_BITSET_MATCH_ANY);
return futex(userspace_address, op | (process_shared ? 0 : FUTEX_PRIVATE_FLAG), value, abstime, NULL, FUTEX_BITSET_MATCH_ANY);
}
static ALWAYS_INLINE int futex_wake(uint32_t* userspace_address, uint32_t count)
static ALWAYS_INLINE int futex_wake(uint32_t* userspace_address, uint32_t count, int process_shared)
{
return futex(userspace_address, FUTEX_WAKE, count, NULL, NULL, 0);
return futex(userspace_address, FUTEX_WAKE | (process_shared ? 0 : FUTEX_PRIVATE_FLAG), count, NULL, NULL, 0);
}
#ifdef ALWAYS_INLINE_SERENITY_H