libSupport.c File Reference

#include <stdio.h>
#include <string.h>
#include "base/abc/abc.h"
#include "mainInt.h"
#include <sys/types.h>
#include <dirent.h>
#include <dlfcn.h>

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Macros
#define	MAX_LIBS   256

Typedefs
typedef void(*	lib_init_end_func) (Abc_Frame_t *pAbc)

Functions
void	open_libs ()
void	close_libs ()
void *	get_fnct_ptr (int lib_num, char *sym_name)
void	call_inits (Abc_Frame_t *pAbc)
void	call_ends (Abc_Frame_t *pAbc)
void	Libs_Init (Abc_Frame_t *pAbc)
void	Libs_End (Abc_Frame_t *pAbc)

Macro Definition Documentation

MAX_LIBS

#define MAX_LIBS   256

CFile****************************************************************

FileName [libSupport.c]

SystemName [ABC: Logic synthesis and verification system.]

PackageName [The main package.]

Synopsis [Support for external libaries.]

Author [Mike Case]

Affiliation [UC Berkeley]

Date [Ver. 1.0. Started - June 20, 2005.]

Revision [

Id

libSupport.c,v 1.1 2005/09/06 19:59:51 casem Exp

]

Definition at line 47 of file libSupport.c.

Typedef Documentation

lib_init_end_func

typedef void(* lib_init_end_func) (Abc_Frame_t *pAbc)

Definition at line 50 of file libSupport.c.

Function Documentation

call_ends()

void call_ends

(

Abc_Frame_t *

pAbc

)

Definition at line 187 of file libSupport.c.

                                  {
    int i;
    lib_init_end_func end_func;
    for (i = 0; libHandles[i] != 0; i++) {
        end_func = (lib_init_end_func) get_fnct_ptr(i, "abc_end");
        if (end_func == 0) {
            printf("Warning: Failed to end library %d.\n", i);
        } else {
            (*end_func)(pAbc);
        }
    }
}

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call_inits()

void call_inits

(

Abc_Frame_t *

pAbc

)

Definition at line 171 of file libSupport.c.

                                   {
    int i;
    lib_init_end_func init_func;
    for (i = 0; libHandles[i] != 0; i++) {
        init_func = (lib_init_end_func) get_fnct_ptr(i, "abc_init");
        if (init_func == 0) {
            printf("Warning: Failed to initialize library %d.\n", i);
        } else {
            (*init_func)(pAbc);
        }
    }
}

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close_libs()

void close_libs

(

)

Definition at line 142 of file libSupport.c.

                  {
#ifdef WIN32
    printf("Warning: close_libs WIN32 not implemented.\n");
#else
    int i;
    for (i = 0; libHandles[i] != 0; i++) {
        if (dlclose(libHandles[i]) != 0) {
            printf("Warning: failed to close library %d\n", i);
        }
        libHandles[i] = 0;
    }
#endif
}

get_fnct_ptr()

void * get_fnct_ptr	(	int	lib_num,
		char *	sym_name )

Definition at line 159 of file libSupport.c.

                                                {
#ifdef WIN32
    printf("Warning: get_fnct_ptr WIN32 not implemented.\n");
    return 0;
#else
    return dlsym(libHandles[lib_num], sym_name);
#endif
}

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Libs_End()

void Libs_End

(

Abc_Frame_t *

pAbc

)

Definition at line 206 of file libSupport.c.

{
    call_ends(pAbc);
 
    // It's good practice to close our libraries at this point, but this can mess up any backtrace printed by Valgind.
    //    close_libs();
}

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Libs_Init()

void Libs_Init

(

Abc_Frame_t *

pAbc

)

Definition at line 200 of file libSupport.c.

{
    open_libs();
    call_inits(pAbc);
}

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open_libs()

void open_libs

(

)

Definition at line 55 of file libSupport.c.

                 {
    int curr_lib = 0;
 
#ifdef WIN32
//    printf("Warning: open_libs WIN32 not implemented.\n");
#else
    DIR* dirp;
    struct dirent* dp;
    char *env, *init_p, *p;
    //int done;
 
    env = getenv ("ABC_LIB_PATH");
    if (env == NULL) {
//    printf("Warning: ABC_LIB_PATH not defined. Looking into the current directory.\n");
      init_p = ABC_ALLOC( char, (2*sizeof(char)) );
      init_p[0]='.'; init_p[1] = 0;
    } else {
      init_p = ABC_ALLOC( char, ((strlen(env)+1)*sizeof(char)) );
      strcpy (init_p, env);
    }
 
    // Extract directories and read libraries
    //done = 0;
    p = init_p;
    //while (!done) {
    for (;;) {
      char *endp = strchr (p,':');
      //if (endp == NULL) done = 1; // last directory in the list
      //else *endp = 0; // end of string
      if (endp != NULL) *endp = 0; // end of string
 
      dirp = opendir(p);
      if (dirp == NULL) {
//      printf("Warning: directory in ABC_LIB_PATH does not exist (%s).\n", p);
        continue;
      }
 
      while ((dp = readdir(dirp)) != NULL) {
        if ((strncmp("libabc_", dp->d_name, 7) == 0) &&
            (strcmp(".so", dp->d_name + strlen(dp->d_name) - 3) == 0)) {
 
          // make sure we don't overflow the handle array
          if (curr_lib >= MAX_LIBS) {
            printf("Warning: maximum number of ABC libraries (%d) exceeded.  Not loading %s.\n",
                   MAX_LIBS,
                   dp->d_name);
          }
          
          // attempt to load it
          else {
            char* szPrefixed = ABC_ALLOC( char, ((strlen(dp->d_name) + strlen(p) + 2) * 
                                      sizeof(char)) );
            sprintf(szPrefixed, "%s/", p);
            strcat(szPrefixed, dp->d_name);
            libHandles[curr_lib] = dlopen(szPrefixed, RTLD_NOW | RTLD_LOCAL);
            
            // did the load succeed?
            if (libHandles[curr_lib] != 0) {
              printf("Loaded ABC library: %s (Abc library extension #%d)\n", szPrefixed, curr_lib);
              curr_lib++;
            } else {
              printf("Warning: failed to load ABC library %s:\n\t%s\n", szPrefixed, dlerror());
            }
            
            ABC_FREE(szPrefixed);
          }
        }
      }
      closedir(dirp);
      //p = endp+1;
      if (endp == NULL) {
        break; // last directory in the list
      } else {
        p = endp+1;
      }
    }
 
    ABC_FREE(init_p);
#endif
    
    // null terminate the list of handles
    libHandles[curr_lib] = 0;    
}

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