Return to test.c CVS log

Up to [NeXTSTEP 3.3 examples] / Examples / UNIX / LKSOutOfLineData / User

Annotation of Examples/UNIX/LKSOutOfLineData/User/test.c, revision 1.1

1.1     ! root        1: /*
        !             2:  * This program exchanges messages with out-of-line data with the kernel server 
        !             3:  * named "mydriver".
        !             4:  */
        !             5:  
        !             6: #import <mach/mach.h>
        !             7: #import <mach/mach_error.h>
        !             8: #import <servers/netname.h>
        !             9: #import <ansi/stdlib.h>
        !            10: #import <ansi/stdio.h>
        !            11: #import "../Library/mydriver.h"
        !            12: #import <bsd/strings.h>
        !            13: 
        !            14: #define DATA "blah "
        !            15: int main()
        !            16: {
        !            17:     kern_return_t   r;
        !            18:     port_name_t mydriver_port;
        !            19:     user_data_t data;
        !            20:     unsigned int data_len;
        !            21: 
        !            22:     /* Look up the advertised port of mydriver so we can send it a message. */
        !            23:     r = netname_look_up(name_server_port, "", "mydriver0", &mydriver_port);
        !            24:     if (r != KERN_SUCCESS)
        !            25:     {
        !            26:        mach_error("Can't find mydriver's advertised port", r);
        !            27:        exit(1);
        !            28:     }
        !            29: 
        !            30:     //
        !            31:     // Allocate space for data.  Need to use vm_allocate to set up
        !            32:     // data or else the LKS won't get paged aligned data.
        !            33:     //
        !            34:     r = vm_allocate(task_self(), (vm_address_t *) &data, vm_page_size, TRUE);
        !            35:     if (r != KERN_SUCCESS)
        !            36:     {
        !            37:        mach_error("Call to vm_allocate failed", r);
        !            38:        exit(1);
        !            39:     }
        !            40: 
        !            41:     strcpy(data, DATA);
        !            42:     data_len = strlen(data) + 1;
        !            43:     printf("Data is: %s\n", data);
        !            44: 
        !            45:     /* Send out-of-line data to the LKS. */
        !            46:     printf("Calling mydriver_import().\n");
        !            47:     r = mydriver_import(mydriver_port, data, data_len);
        !            48:     if (r != KERN_SUCCESS)
        !            49:     {
        !            50:        mach_error("Error calling mydriver_import", r);
        !            51:        exit(1);
        !            52:     }
        !            53: 
        !            54:     /* remove the out_of_band data from our task's vm */
        !            55:     r = vm_deallocate(task_self(), (vm_address_t) data, vm_page_size);
        !            56:     if (r != KERN_SUCCESS)
        !            57:     {
        !            58:        mach_error("Error calling mydriver_import vm_deallocate", r);
        !            59:        exit(1);
        !            60:     }
        !            61: 
        !            62:     /* Receive out-of-line data from the LKS. */
        !            63:     printf("Calling mydriver_export().\n");
        !            64:     r = mydriver_export(mydriver_port, &data, &data_len);
        !            65:     if (r != KERN_SUCCESS)
        !            66:     {
        !            67:        mach_error("Error calling mydriver_export", r);
        !            68:        exit(1);
        !            69:     }
        !            70:     
        !            71:     printf("Trying to access data.\n");
        !            72:     printf("Contents of data are: %s\n", data);
        !            73: 
        !            74:     /* remove the out_of_band data from our task's vm */
        !            75:     r = vm_deallocate(task_self(), (vm_address_t) data, vm_page_size);
        !            76:     if (r != KERN_SUCCESS)
        !            77:     {
        !            78:        mach_error("Error calling mydriver_export vm_deallocate", r);
        !            79:        exit(1);
        !            80:     }
        !            81:     
        !            82:     return 0;
        !            83: }

This archive runs on limited infrastructure. Preserving old code on modern bandwidth. Automated agents are requested to crawl responsibly.