cython

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# https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/sys_wait.h.html
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from posix.types cimport pid_t, id_t
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from posix.signal cimport siginfo_t
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from posix.resource cimport rusage
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cdef extern from "<sys/wait.h>" nogil:
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    enum: WNOHANG
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    enum: WUNTRACED
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    enum: WCONTINUED
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    enum: WEXITED
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    enum: WSTOPPED
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    enum: WNOWAIT
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    int WEXITSTATUS(int status)
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    int WIFCONTINUED(int status)
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    int WIFEXITED(int status)
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    int WIFSIGNALED(int status)
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    int WIFSTOPPED(int status)
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    int WSTOPSIG(int status)
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    int WTERMSIG(int status)
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    ctypedef int idtype_t
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    enum: P_ALL             # idtype_t values
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    enum: P_PID
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    enum: P_PGID
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    pid_t wait(int *stat_loc)
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    pid_t waitpid(pid_t pid, int *status, int options)
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    int waitid(idtype_t idtype, id_t id, siginfo_t *infop, int options)
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# wait3 was in POSIX until 2008 while wait4 was never standardized.
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# Even so, these calls are in almost every Unix, always in sys/wait.h.
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# Hence, posix.wait is the least surprising place to declare them for Cython.
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# libc may require _XXX_SOURCE to be defined at C-compile time to provide them.
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    pid_t wait3(int *status, int options, rusage *rusage)
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    pid_t wait4(pid_t pid, int *status, int options, rusage *rusage)
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