eb0e8fa0b1
don't waste time (and significant code size due to function call overhead!) setting errno when the result of a syscall does not matter or when it can't fail.
39 lines
872 B
C
39 lines
872 B
C
#include "pthread_impl.h"
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static struct pthread main_thread;
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/* pthread_key_create.c overrides this */
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static const void *dummy[1] = { 0 };
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weak_alias(dummy, __pthread_tsd_main);
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#undef errno
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static int *errno_location()
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{
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return __pthread_self()->errno_ptr;
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}
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static int init_main_thread()
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{
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main_thread.canceldisable = libc.canceldisable;
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main_thread.tsd = (void **)__pthread_tsd_main;
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main_thread.self = &main_thread;
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if (__set_thread_area(&main_thread) < 0)
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return -1;
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main_thread.errno_ptr = __errno_location();
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libc.errno_location = errno_location;
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main_thread.tid = main_thread.pid =
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__syscall(SYS_set_tid_address, &main_thread.tid);
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return 0;
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}
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pthread_t pthread_self()
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{
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static int init, failed;
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if (!init) {
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if (failed) return 0;
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if (init_main_thread() < 0) failed = 1;
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if (failed) return 0;
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init = 1;
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}
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return __pthread_self();
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}
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