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274 lines (238 loc) · 7.29 KB
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/**
* @author Dominic Eschweiler <dominic@eschweiler.at>
*
* @section LICENSE
*
* Copyright (c) 2015, Dominic Eschweiler
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* 3. Neither the name of the copyright holder nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
*/
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <stdbool.h>
#include <stdint.h>
#include <string.h>
#include <pda.h>
#include <inttypes.h>
#define DEBUG_CHANNEL stderr
#define ENV_VAR "PDA_DEBUG"
#define ENV_ERR "PDA_ERROR"
#define ENV_WRN "PDA_WARNING"
typedef struct
PdaDebugErrorCode_struct
{
PdaDebugReturnCode ID;
char *description;
}PdaDebugErrorCode;
static const PdaDebugErrorCode
codes[] =
{
{EPERM, "Operation not permitted!" },
{ENOENT, "No such file or directory!" },
{ESRCH, "No such process!" },
{EINTR, "Interrupted system call!" },
{EIO, "I/O error!" },
{ENXIO, "No such device or address!" },
{E2BIG, "Argument list too long!" },
{ENOEXEC, "Exec format error!" },
{EBADF, "Bad file number!" },
{ECHILD, "No child processes!" },
{EAGAIN, "Try again!" },
{ENOMEM, "Out of memory!" },
{EACCES, "Permission denied!" },
{EFAULT, "Bad address!" },
{ENOTBLK, "Block device required!" },
{EBUSY, "Device or resource busy!" },
{EEXIST, "File exists!" },
{EXDEV, "Cross-device link!" },
{ENODEV, "No such device!" },
{ENOTDIR, "Not a directory!" },
{EISDIR, "Is a directory!" },
{EINVAL, "Invalid argument!" },
{ENFILE, "File table overflow!" },
{EMFILE, "Too many open files!" },
{ENOTTY, "Not a typewriter!" },
{ETXTBSY, "Text file busy!" },
{EFBIG, "File too large!" },
{ENOSPC, "No space left on device!" },
{ESPIPE, "Illegal seek!" },
{EROFS, "Read-only file system!" },
{EMLINK, "Too many links!" },
{EPIPE, "Broken pipe!" },
{EDOM, "Math argument out of domain of func!" },
{ERANGE, "Math result not representable!" },
{0, NULL }
};
static inline
char
*
PdaDebugTranslate
(
const PdaDebugReturnCode errorcode
)
{
PdaDebugErrorCode *code = (PdaDebugErrorCode*)&codes[0];
for(int64_t i = 0; code->description != NULL; i++)
{
code = (PdaDebugErrorCode*)&codes[i];
if(code->ID == errorcode)
{
return code->description;
}
}
return NULL;
}
static PdaDebugTypes debug_mask = 0;
static uint32_t activated = 0;
static inline void
PdaDebugInit()
{
if(activated == 0)
{
activated = 1;
const char *environment_pda_debug
= getenv(ENV_VAR);
if(environment_pda_debug)
{
debug_mask = atoi(environment_pda_debug);
}
if(false)
{
fprintf(DEBUG_CHANNEL,
ENV_WRN " : The PDA library has debug support "
"(current debug mask is %u).\n", debug_mask );
fprintf(DEBUG_CHANNEL,
ENV_WRN " : Please use the environment variable " ENV_VAR
" to change the debug mask!\n");
fprintf(DEBUG_CHANNEL,
ENV_WRN " : Please set " ENV_VAR " to the value %u to "
"get all debug output!\n", PDADEBUG_ALL);
}
}
}
int64_t
PdaErrorHandler
(
const int64_t errorcode,
const char *file,
const uint64_t line,
const char *format,
...
)
{
#ifdef DEBUG
PdaDebugInit();
if( (debug_mask & PDADEBUG_ERROR) != PDADEBUG_ERROR)
{
return errorcode;
}
fprintf(DEBUG_CHANNEL, ENV_ERR " (%s:%" PRIu64 ") : (%" PRIi64 " : %s ) ",
file, line, errorcode, strerror(errorcode) );
if(format)
{
va_list va;
va_start(va, format);
vfprintf(DEBUG_CHANNEL, format, va);
va_end(va);
}
#endif
errno = errorcode;
return errorcode;
}
void
PdaDebugPrintf
(
const PdaDebugTypes mask,
const char *file,
const uint64_t line,
const char *function,
const char *format,
...
)
{
#ifdef DEBUG
PdaDebugInit();
if( (debug_mask & mask) != mask)
{
return;
}
if(mask == PDADEBUG_ENTER)
{
fprintf(DEBUG_CHANNEL, ENV_VAR " (%s:%" PRIu64 ") : ENTER (%s)\n", file, line, function);
return;
}
if(mask == PDADEBUG_EXIT)
{
fprintf(DEBUG_CHANNEL, ENV_VAR " (%s:%" PRIu64 ") : EXIT (%s)\n", file, line, function);
return;
}
if(format)
{
fprintf(DEBUG_CHANNEL, ENV_VAR " (%s:%" PRIu64 ") : ", file, line);
va_list va;
va_start(va, format);
vfprintf(DEBUG_CHANNEL, format, va);
va_end(va);
}
#endif
}
void
PdaWarningHandler
(
const char *file,
const uint64_t line,
const char *format,
...
)
{
#ifdef DEBUG
if(format)
{
fprintf(DEBUG_CHANNEL, ENV_WRN " (%s:%" PRIu64 ") : ", file, line);
va_list va;
va_start(va, format);
vfprintf(DEBUG_CHANNEL, format, va);
va_end(va);
}
#endif
}
int
pda_spinOpen(const char *path, int flags, mode_t mode, uint64_t spins)
{
int fd = -1;
for(uint64_t i=0; i<spins; i++)
{
fd = open(path, flags, mode);
if(fd != -1){ break; }
usleep(1 << i);
}
return(fd);
}