1 // Copyright (c) 2010 Google Inc.
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29 
30 #ifndef COMMON_LINUX_EINTR_WRAPPER_H_
31 #define COMMON_LINUX_EINTR_WRAPPER_H_
32 
33 #include <errno.h>
34 
35 // This provides a wrapper around system calls which may be interrupted by a
36 // signal and return EINTR. See man 7 signal.
37 //
38 
39 #define HANDLE_EINTR(x) ({ \
40   __typeof__(x) eintr_wrapper_result; \
41   do { \
42     eintr_wrapper_result = (x); \
43   } while (eintr_wrapper_result == -1 && errno == EINTR); \
44   eintr_wrapper_result; \
45 })
46 
47 #define IGNORE_EINTR(x) ({ \
48   __typeof__(x) eintr_wrapper_result; \
49   do { \
50     eintr_wrapper_result = (x); \
51     if (eintr_wrapper_result == -1 && errno == EINTR) { \
52       eintr_wrapper_result = 0; \
53     } \
54   } while (0); \
55   eintr_wrapper_result; \
56 })
57 
58 #endif  // COMMON_LINUX_EINTR_WRAPPER_H_
59