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Add epoll and do more release readiness changes

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This change also pays off some of the remaining technical debt with
stdio, file descriptors, and memory managemnt polyfills.
This commit is contained in:
Justine Tunney
2020-11-28 12:01:51 -08:00
parent a9ea949df8
commit 3e4fd4b0ad
271 changed files with 5706 additions and 1365 deletions
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51
libc/bits/bits.h
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@ -277,27 +277,17 @@ unsigned long hamming(unsigned long, unsigned long) pureconst;
* @return true if value was exchanged, otherwise false
* @see lockcmpxchg()
*/
#define cmpxchg(IFTHING, ISEQUALTOME, REPLACEITWITHME) \
({ \
bool DidIt; \
asm(ZFLAG_ASM("cmpxchg\t%3,%1") \
: ZFLAG_CONSTRAINT(DidIt), "+m"(*(IFTHING)), "+a"(*(ISEQUALTOME)) \
: "r"((typeof(*(IFTHING)))(REPLACEITWITHME)) \
: "cc"); \
DidIt; \
})
#define ezcmpxchg(IFTHING, ISEQUALTOME, REPLACEITWITHME) \
({ \
bool DidIt; \
autotype(IFTHING) IfThing = (IFTHING); \
typeof(*IfThing) IsEqualToMe = (ISEQUALTOME); \
typeof(*IfThing) ReplaceItWithMe = (REPLACEITWITHME); \
asm(ZFLAG_ASM("cmpxchg\t%3,%1") \
: ZFLAG_CONSTRAINT(DidIt), "+m"(*IfThing), "+a"(IsEqualToMe) \
: "r"(ReplaceItWithMe) \
: "cc"); \
DidIt; \
#define cmpxchg(IFTHING, ISEQUALTOME, REPLACEITWITHME) \
({ \
bool DidIt; \
autotype(IFTHING) IfThing = (IFTHING); \
typeof(*IfThing) IsEqualToMe = (ISEQUALTOME); \
typeof(*IfThing) ReplaceItWithMe = (REPLACEITWITHME); \
asm volatile(ZFLAG_ASM("cmpxchg\t%3,%1") \
: ZFLAG_CONSTRAINT(DidIt), "+m"(*IfThing), "+a"(IsEqualToMe) \
: "r"(ReplaceItWithMe) \
: "cc"); \
DidIt; \
})
/**
@ -307,14 +297,17 @@ unsigned long hamming(unsigned long, unsigned long) pureconst;
* @return true if value was exchanged, otherwise false
* @see lockcmpxchg()
*/
#define lockcmpxchg(IFTHING, ISEQUALTOME, REPLACEITWITHME) \
({ \
bool DidIt; \
asm(ZFLAG_ASM("lock cmpxchg\t%3,%1") \
: ZFLAG_CONSTRAINT(DidIt), "+m"(*(IFTHING)), "+a"(*(ISEQUALTOME)) \
: "r"((typeof(*(IFTHING)))(REPLACEITWITHME)) \
: "cc"); \
DidIt; \
#define lockcmpxchg(IFTHING, ISEQUALTOME, REPLACEITWITHME) \
({ \
bool DidIt; \
autotype(IFTHING) IfThing = (IFTHING); \
typeof(*IfThing) IsEqualToMe = (ISEQUALTOME); \
typeof(*IfThing) ReplaceItWithMe = (REPLACEITWITHME); \
asm volatile(ZFLAG_ASM("lock cmpxchg\t%3,%1") \
: ZFLAG_CONSTRAINT(DidIt), "+m"(*IfThing), "+a"(IsEqualToMe) \
: "r"(ReplaceItWithMe) \
: "cc"); \
DidIt; \
})
/**