Last change
on this file since 388 was 388, checked in by coas-nagasima, 5 years ago |
Azure IoT Hub Device C SDK を使ったサンプルの追加
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Property svn:eol-style
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native
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Property svn:keywords
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Id
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Property svn:mime-type
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text/x-csrc
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File size:
667 bytes
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[388] | 1 | #include "pthread_impl.h"
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| 2 | #include "atomic.h"
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| 3 | #include "syscall.h"
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| 4 | /* cheat and reuse CRTJMP macro from dynlink code */
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| 5 | #include "dynlink.h"
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| 6 |
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| 7 | static volatile int lock;
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| 8 | static void *unmap_base;
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| 9 | static size_t unmap_size;
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| 10 | static char shared_stack[256];
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| 11 |
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| 12 | static void do_unmap()
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| 13 | {
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| 14 | __syscall(SYS_munmap, unmap_base, unmap_size);
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| 15 | __syscall(SYS_exit);
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| 16 | }
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| 17 |
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| 18 | void __unmapself(void *base, size_t size)
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| 19 | {
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| 20 | int tid=__pthread_self()->tid;
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| 21 | char *stack = shared_stack + sizeof shared_stack;
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| 22 | stack -= (uintptr_t)stack % 16;
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| 23 | while (lock || a_cas(&lock, 0, tid))
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| 24 | a_spin();
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| 25 | __syscall(SYS_set_tid_address, &lock);
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| 26 | unmap_base = base;
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| 27 | unmap_size = size;
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| 28 | CRTJMP(do_unmap, stack);
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| 29 | }
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