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Make mutex calling code 10x tinier

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Calls to lock/unlock functions are now NOPs by default. The first time
clone() is called, they get turned into CALL instructions. Doing this
caused funcctions like fputc() to shrink from 85 bytes to 45+4 bytes.
Since the ANSI solution of `(__threaded && lock())` inlines os much
superfluous binary content into functions all over the place.
This commit is contained in:
Justine Tunney 2022-06-12 19:33:42 -07:00
parent 8cdec62f5b
commit 8b72490431
32 changed files with 494 additions and 210 deletions
Download patch file Download diff file Expand all files Collapse all files

18
libc/intrin/pthread.h
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@ -7,15 +7,15 @@ COSMOPOLITAN_C_START_
#define PTHREAD_ONCE_INIT 0
#define PTHREAD_MUTEX_DEFAULT PTHREAD_MUTEX_RECURSIVE
#define PTHREAD_MUTEX_NORMAL 0
#define PTHREAD_MUTEX_DEFAULT 0
#define PTHREAD_MUTEX_RECURSIVE 1
#define PTHREAD_MUTEX_ERRORCHECK 2
#define PTHREAD_MUTEX_STALLED 0
#define PTHREAD_MUTEX_ROBUST 1
/* clang-format off */
#define PTHREAD_MUTEX_INITIALIZER {0}
#define PTHREAD_MUTEX_INITIALIZER {PTHREAD_MUTEX_DEFAULT}
#define PTHREAD_RWLOCK_INITIALIZER {{{0}}}
#define PTHREAD_COND_INITIALIZER {{{0}}}
/* clang-format on */
@ -24,21 +24,22 @@ typedef unsigned long *pthread_t;
typedef int pthread_once_t;
typedef struct {
int attr;
int reent;
_Atomic(int) owner;
_Atomic(int) waits;
int reent;
} pthread_mutex_t;
typedef struct {
unsigned __attr;
int attr;
} pthread_mutexattr_t;
typedef struct {
unsigned __attr;
int attr;
} pthread_condattr_t;
typedef struct {
unsigned __attr[2];
int attr[2];
} pthread_rwlockattr_t;
typedef struct {
@ -69,6 +70,7 @@ wontreturn void pthread_exit(void *);
pureconst pthread_t pthread_self(void);
int pthread_create(pthread_t *, const pthread_attr_t *, void *(*)(void *),
void *);
int pthread_yield(void);
int pthread_detach(pthread_t);
int pthread_join(pthread_t, void **);
int pthread_equal(pthread_t, pthread_t);
@ -80,6 +82,10 @@ int pthread_mutex_trylock(pthread_mutex_t *);
int pthread_mutex_timedlock(pthread_mutex_t *, const struct timespec *);
int pthread_mutex_destroy(pthread_mutex_t *);
int pthread_mutex_consistent(pthread_mutex_t *);
int pthread_mutexattr_init(pthread_mutexattr_t *);
int pthread_mutexattr_destroy(pthread_mutexattr_t *);
int pthread_mutexattr_gettype(const pthread_mutexattr_t *, int *);
int pthread_mutexattr_settype(pthread_mutexattr_t *, int);
int pthread_cond_init(pthread_cond_t *, const pthread_condattr_t *);
int pthread_cond_destroy(pthread_cond_t *);
int pthread_cond_wait(pthread_cond_t *, pthread_mutex_t *);