#define MVM_PIPE_INHERIT        1
#define MVM_PIPE_IGNORE         2
#define MVM_PIPE_CAPTURE        4
#define MVM_PIPE_INHERIT_IN     1
#define MVM_PIPE_IGNORE_IN      2
#define MVM_PIPE_CAPTURE_IN     4
#define MVM_PIPE_INHERIT_OUT    8
#define MVM_PIPE_IGNORE_OUT    16
#define MVM_PIPE_CAPTURE_OUT   32
#define MVM_PIPE_INHERIT_ERR   64
#define MVM_PIPE_IGNORE_ERR   128
#define MVM_PIPE_CAPTURE_ERR  256
#define MVM_PIPE_MERGED_OUT_ERR 512

MVMObject * MVM_proc_getenvhash(MVMThreadContext *tc);
MVMObject * MVM_proc_spawn_async(MVMThreadContext *tc, MVMObject *queue, MVMString *prog,
         MVMObject *args, MVMString *cwd, MVMObject *env, MVMObject *callbacks);
void MVM_proc_kill_async(MVMThreadContext *tc, MVMObject *handle, MVMint64 signal);
MVMint64 MVM_proc_getpid(MVMThreadContext *tc);
MVMint64 MVM_proc_getppid(MVMThreadContext *tc);
MVMint64 MVM_proc_rand_i(MVMThreadContext *tc);
MVMnum64 MVM_proc_rand_n(MVMThreadContext *tc);
MVMnum64 MVM_proc_randscale_n(MVMThreadContext *tc, MVMnum64 scale);
void MVM_proc_seed(MVMThreadContext *tc, MVMint64 seed);
MVMuint64 MVM_proc_time(MVMThreadContext *tc);
MVMObject * MVM_proc_clargs(MVMThreadContext *tc);
MVMString * MVM_executable_name(MVMThreadContext *tc);
void MVM_proc_getrusage(MVMThreadContext *tc, MVMObject *result);
MVMint64 MVM_proc_fork(MVMThreadContext *tc);

#ifdef _WIN32
#include <wchar.h>
MVM_PUBLIC char ** MVM_UnicodeToUTF8_argv(const int argc, wchar_t **argv);
#endif