mha_os.h File Reference

Classes
class	mha_stash_environment_variable_t
	This class changes the value of an environment variable when constructed and restores the original state of the environment variable when destroyed. More...
class	dynamiclib_t
	Wrapper class around a shared library. More...
class	pluginlib_t
	Specialisation of dynamiclib_t for mha plugin libraries. More...

Macros
#define	mha_loadlib(x)   dlopen(x,RTLD_NOW)
#define	mha_freelib(x)   dlclose(x)
#define	mha_freelib_success(x)   (x == 0)
#define	mha_getlibfun(h, x)   x ## _cb = (x ## _t)dlsym(h,#x)
#define	mha_getlibfun_checked(h, x)   x ## _cb = (x ## _t)dlsym(h,#x);if(! x ## _cb) throw MHA_Error(__FILE__,__LINE__,"Function " #x " is undefined.")
#define	mha_loadlib_error(x)   dlerror()
#define	mha_lib_extension   ".so"
#define	mha_msleep(milliseconds)   usleep((milliseconds)*1000)
#define	FMTsz   "%zu"
	printf modifier to print integers of type size_t More...
#define	MHA_RESOLVE(h, t)   t ## _cb = (t ## _t)(h->resolve(#t))
#define	MHA_RESOLVE_CHECKED(h, t)   t ## _cb = (t ## _t)(h->resolve_checked(#t))

Typedefs
typedef void *	mha_libhandle_t

Functions
std::string	mha_getenv (const std::string &envvar)
	Get value of environment variable. More...
bool	mha_hasenv (const std::string &envvar)
	Checks if environment variable exists. More...
int	mha_setenv (const std::string &envvar, const std::string &value)
	Set value of environment variable. More...
void	mha_delenv (const std::string &envvar)
	Deletes environment variable from process environment if it exists. More...
std::list< std::string >	mha_library_paths ()
std::list< std::string >	list_dir (const std::string &path, const std::string &pattern)
void	mha_hton (float *data, unsigned int len)
void	mha_ntoh (float *data, unsigned int len)
void	mha_hton (uint32_t *data, unsigned int len)
void	mha_ntoh (uint32_t *data, unsigned int len)
void	mha_hton (int32_t *data, unsigned int len)
void	mha_ntoh (int32_t *data, unsigned int len)

Macro Definition Documentation

mha_loadlib

#define mha_loadlib

(

x

)

dlopen(x,RTLD_NOW)

mha_freelib

#define mha_freelib

(

x

)

dlclose(x)

mha_freelib_success

#define mha_freelib_success

(

x

)

(x == 0)

mha_getlibfun

#define mha_getlibfun	(		h,
			x
	)		x ## _cb = (x ## _t)dlsym(h,#x)

mha_getlibfun_checked

#define mha_getlibfun_checked	(		h,
			x
	)		x ## _cb = (x ## _t)dlsym(h,#x);if(! x ## _cb) throw MHA_Error(__FILE__,__LINE__,"Function " #x " is undefined.")

mha_loadlib_error

#define mha_loadlib_error

(

x

)

dlerror()

mha_lib_extension

#define mha_lib_extension   ".so"

mha_msleep

#define mha_msleep

(

milliseconds

)

usleep((milliseconds)*1000)

FMTsz

#define FMTsz   "%zu"

printf modifier to print integers of type size_t

MHA_RESOLVE

#define MHA_RESOLVE	(		h,
			t
	)		t ## _cb = (t ## _t)(h->resolve(#t))

MHA_RESOLVE_CHECKED

#define MHA_RESOLVE_CHECKED	(		h,
			t
	)		t ## _cb = (t ## _t)(h->resolve_checked(#t))

Typedef Documentation

mha_libhandle_t

typedef void* mha_libhandle_t

Function Documentation

mha_getenv()

std::string mha_getenv

(

const std::string &

envvar

)

Get value of environment variable.

Parameters

envvar

Name of environment variable to retrieve

Returns

content of environment variable if it exists, empty string if the environment variable does not exist

mha_hasenv()

bool mha_hasenv

(

const std::string &

envvar

)

Checks if environment variable exists.

Parameters

envvar

Name of environment variable to check

Returns

true if the environment has a variable of this name

mha_setenv()

int mha_setenv	(	const std::string &	envvar,
		const std::string &	value
	)

Set value of environment variable.

Parameters

envvar	Name of environment variable to set
value	New content for environment variable

Returns

error code: 0 on success, OS dependent error code on failure

mha_delenv()

void mha_delenv

(

const std::string &

envvar

)

Deletes environment variable from process environment if it exists.

Parameters

envvar

Name of environment variable to delete

mha_library_paths()

std::list<std::string> mha_library_paths

(

)

list_dir()

std::list<std::string> list_dir	(	const std::string &	path,
		const std::string &	pattern
	)

mha_hton() [1/3]

void mha_hton ( float *  data, unsigned int  len  )

inline

mha_ntoh() [1/3]

void mha_ntoh ( float *  data, unsigned int  len  )

inline

mha_hton() [2/3]

void mha_hton ( uint32_t *  data, unsigned int  len  )

inline

mha_ntoh() [2/3]

void mha_ntoh ( uint32_t *  data, unsigned int  len  )

inline

mha_hton() [3/3]

void mha_hton ( int32_t *  data, unsigned int  len  )

inline

mha_ntoh() [3/3]

void mha_ntoh ( int32_t *  data, unsigned int  len  )

inline