mod_raw.h File Reference

Go to the source code of this file.

Macros
#define	DYNL_KERNEL_HANDLE   ((void*) 0x1)

Enumerations
enum	lib_types {   LT_NONE, LT_NOTFOUND, LT_SINGULAR, LT_ELF,   LT_HPUX, LT_MACH_O, LT_BUILTIN }

Functions
void *	dynl_open_binary_warn (const char *binary_name, const char *msg=NULL)
void *	dynl_sym_warn (void *handle, const char *proc, const char *msg=NULL)
int	dynl_check_opened (char *filename)
void *	dynl_open (char *filename)
void *	dynl_sym (void *handle, const char *symbol)
int	dynl_close (void *handle)
const char *	dynl_error ()

Macro Definition Documentation

#define DYNL_KERNEL_HANDLE   ((void*) 0x1)

Definition at line 32 of file mod_raw.h.

Enumeration Type Documentation

enum lib_types

Enumerator
LT_NONE
LT_NOTFOUND
LT_SINGULAR
LT_ELF
LT_HPUX
LT_MACH_O
LT_BUILTIN

Definition at line 16 of file mod_raw.h.

{ LT_NONE, LT_NOTFOUND, LT_SINGULAR, LT_ELF, LT_HPUX, LT_MACH_O, LT_BUILTIN} lib_types;

Function Documentation

int dynl_check_opened

(

char *

filename

)

Definition at line 150 of file mod_raw.cc.

{
  return dlopen(filename,RTLD_NOW|RTLD_NOLOAD) != NULL;
}

int dynl_close

(

void *

handle

)

Definition at line 182 of file mod_raw.cc.

{
  return(dlclose (handle));
}

const char* dynl_error

(

)

Definition at line 187 of file mod_raw.cc.

{
  return(dlerror());
}

void* dynl_open

(

char *

filename

)

Definition at line 157 of file mod_raw.cc.

{
// glibc 2.2:
  if ((filename==NULL) || (dlopen(filename,RTLD_NOW|RTLD_NOLOAD)==NULL))
    return(dlopen(filename, RTLD_NOW|RTLD_GLOBAL));
  else
    Werror("module %s already loaded",filename);
  return NULL;
// alternative
//    return(dlopen(filename, RTLD_NOW|RTLD_GLOBAL));
}

void* dynl_open_binary_warn	(	const char *	binary_name,
		const char *	msg = NULL
	)

Definition at line 60 of file mod_raw.cc.

{
  void* handle = NULL;
  char* binary_name_so=NULL;
  BOOLEAN found=FALSE;

  // try P_PROCS_DIR (%P)
  char* proc_path = feGetResource('P');
  if (proc_path != NULL)
  {
    char *p;
    char *q;
    p=proc_path;
    int binary_name_so_length = 3 + strlen(DL_TAIL) + strlen(binary_name) + strlen(DIR_SEPP) + strlen(proc_path);
    binary_name_so = (char *)omAlloc0( binary_name_so_length * sizeof(char) );
    while((p!=NULL)&&(*p!='\0'))
    {
      q=strchr(p,fePathSep);
      if (q!=NULL) *q='\0';
      strcpy(binary_name_so,p);
      if (q!=NULL) *q=fePathSep;
      strcat(binary_name_so,DIR_SEPP);
      strcat(binary_name_so,binary_name);
      strcat(binary_name_so,DL_TAIL);
      if(!access(binary_name_so, R_OK)) { found=TRUE; break; }
      if (q!=NULL) p=q+1; else p=NULL;
    }
    if (found) handle = dynl_open(binary_name_so);
  }

  if (handle == NULL && ! warn_handle)
  {
    Warn("Could not find dynamic library: %s%s (path %s)",
            binary_name, DL_TAIL,proc_path);
    if (found) Warn("Error message from system: %s", dynl_error());
    if (msg != NULL) Warn("%s", msg);
    Warn("See the INSTALL section in the Singular manual for details.");
    warn_handle = TRUE;
  }
  omfree((ADDRESS)binary_name_so );

  return  handle;
}

void* dynl_sym	(	void *	handle,
		const char *	symbol
	)

Definition at line 171 of file mod_raw.cc.

{
  if (handle == DYNL_KERNEL_HANDLE)
  {
    if (kernel_handle == NULL)
      kernel_handle = dynl_open(NULL);
    handle = kernel_handle;
  }
  return(dlsym(handle, symbol));
}

void* dynl_sym_warn	(	void *	handle,
		const char *	proc,
		const char *	msg = NULL
	)

Definition at line 104 of file mod_raw.cc.

{
  void *proc_ptr = NULL;
  if (handle != NULL)
  {
    proc_ptr = dynl_sym(handle, proc);
    if (proc_ptr == NULL && ! warn_proc)
    {
      Warn("Could load a procedure from a dynamic library");
      Warn("Error message from system: %s", dynl_error());
      if (msg != NULL) Warn("%s", msg);
      Warn("See the INSTALL section in the Singular manual for details.");
      warn_proc = TRUE;
    }
  }
  return proc_ptr;
}