Merge pull request #429 from larsmans/posix

wrap POSIX dynamic linking API and stdio.h extensions

Cython/Includes/posix/dlfcn.pxd

+# POSIX dynamic linking/loading interface.
+# http://pubs.opengroup.org/onlinepubs/9699919799/basedefs/dlfcn.h.html
+
+cdef extern from "dlfcn.h" nogil:
+    void *dlopen(const char *, int)
+    char *dlerror()
+    void *dlsym(void *, const char *)
+    int dlclose(void *)
+
+    enum:
+        RTLD_LAZY
+        RTLD_NOW
+        RTLD_GLOBAL
+        RTLD_LOCAL

Cython/Includes/posix/stdio.pxd

+# POSIX additions to <stdio.h>.
+# http://pubs.opengroup.org/onlinepubs/9699919799/basedefs/stdio.h.html
+
+from libc.stdio cimport FILE
+from libc.stddef cimport wchar_t
+from posix.types cimport off_t
+
+cdef extern from "stdio.h" nogil:
+    # File descriptors
+    FILE *fdopen(int, const char *)
+    int fileno(FILE *)
+
+    # Pipes
+    FILE *popen(const char *, const char *)
+    int pclose(FILE *)
+
+    # Memory streams (POSIX.2008)
+    FILE *fmemopen(void *, size_t, const char *)
+    FILE *open_memstream(char **, size_t *)
+    FILE *open_wmemstream(wchar_t **, size_t *)
+
+    # Seek and tell with off_t
+    int fseeko(FILE *, off_t, int)
+    off_t ftello(FILE *)
+
+    # Locking (for multithreading)
+    void flockfile(FILE *)
+    int ftrylockfile(FILE *)
+    void funlockfile(FILE *)
+    int getc_unlocked(FILE *)
+    int getchar_unlocked()
+    int putc_unlocked(int, FILE *)
+    int putchar_unlocked(int)
+
+    # Reading lines and records (POSIX.2008)
+    ssize_t getline(char **, size_t *, FILE *)
+    ssize_t getdelim(char **, size_t *, int, FILE *)

tests/compile/posix_pxds.pyx

@@ -23,6 +23,10 @@ cimport posix.stat
 from posix cimport stat
 from posix.stat cimport *
 
+cimport posix.stdio
+from posix cimport stdio
+from posix.stdio cimport *
+
 cimport posix.stdlib
 from posix cimport stdlib
 from posix.stdlib cimport *
@@ -42,3 +46,7 @@ from posix.wait cimport *
 cimport posix.mman
 from posix cimport mman
 from posix.mman cimport *
+
+cimport posix.dlfcn
+from posix cimport dlfcn
+from posix.dlfcn cimport *