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/* See LICENSE file for copyright and license details. */
#ifndef LIBGAMMA_ERROR_HH
#define LIBGAMMA_ERROR_HH
#include <exception>
#include <string>
#include "libgamma-native.hh"
#if defined(__GNUC__)
# define LIBGAMMAMM_PURE__ __attribute__((__pure__))
#else
# define LIBGAMMAMM_PURE__
#endif
#if !defined(__WIN32__)
# define libgamma_gid_t gid_t
#else
# define libgamma_gid_t short
#endif
namespace libgamma
{
/**
* Class for `group_gid`
*/
class GroupGid;
/**
* Class for `group_name`
*/
class GroupName;
/**
* Prints an error to stderr in a `perror` fashion,
* however this function will not translate the `libgamma`
* errors into human-readable strings, it will simply
* print the name of the error. If the value `error_code`
* is the value of `LIBGAMMA_ERRNO_SET`, `perror` will be
* used to print the current error stored in `errno`.
* If `error_code` is non-negative (an `errno` value`), that
* value will be stored in `errno` and `perror` will be
* used to print it. Additionally, if the `error_code` is
* the value of `LIBGAMMA_DEVICE_REQUIRE_GROUP` the
* required group will be printed with its numerical value
* and, if known, its name.
*
* @param name The text to add at the beginning
* @param value The error code, may be an `errno` value
*/
void perror(const std::string name, int error_code);
/**
* Returns the name of the definition associated with a `nullptr` error code
*
* @param value The error code
* @return The name of the definition associated with the error code,
* `nullptr` if the error code does not exist
*/
std::string *name_of_error(int value);
/**
* Return the value of a `libgamma` error definition refered to by name
*
* @param name The name of the definition associated with the error code
* @return The error code, zero if the name is `nullptr`
* or does not refer to a `libgamma` error
*/
LIBGAMMAMM_PURE__ int value_of_error(const std::string *name);
/**
* Class for `group_gid`
*/
class GroupGid
{
public:
const GroupGid &
operator =(const libgamma_gid_t &value) const
{
libgamma_group_gid = value;
return *this;
}
operator libgamma_gid_t() const
{
return libgamma_group_gid;
}
};
/**
* Group that the user needs to be a member of if
* `LIBGAMMA_DEVICE_REQUIRE_GROUP` is returned
*/
extern GroupGid group_gid;
/**
* Class for `group_name`
*/
class GroupName
{
public:
const GroupName &
operator =(const char *value) const
{
libgamma_group_name = value;
return *this;
}
operator const char *() const
{
return libgamma_group_name;
}
};
/**
* Group that the user needs to be a member of if
* `LIBGAMMA_DEVICE_REQUIRE_GROUP` is returned,
* `nullptr` if the name of the group
* `libgamma::group_gid` cannot be determined
*/
extern GroupName group_name;
/**
* Libgamma exception class
*/
class LibgammaException : public std::exception
{
public:
/**
* Constructor
*
* @param error_code The error code
*/
LibgammaException(int error_code) throw();
/**
* Destructor
*/
virtual ~LibgammaException() throw();
/**
* Get the error as a string
*/
virtual const char *what() const throw();
/**
* The error code
*/
int error_code;
};
/**
* Create an exception from an error code
* that may come from `errno.h` or be a
* `libgamma` error code
*
* @param error_code The error code
* @return The error object
*/
LibgammaException create_error(int error_code);
}
#endif
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