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1.3.3 XDCtools Modules and Runtime APIs
XDCtools contains several modules that provide basic system services your SYS/BIOS application will
need to operate successfully. Most of these modules are located in the xdc.runtime package in XDCtools.
By default, all SYS/BIOS applications automatically add the xdc.runtime package during build time.
The functionality provided by XDCtools for use in your C code and configuration file can be roughly
divided into four categories. The modules listed in the following table are in the xdc.runtime package,
unless otherwise noted.
Table 1–2. XDCtools Modules Using in C Code and Configuration
Category Modules Description
System Services System Basic low-level "system" services. For example, character output,
printf-like output, and exit handling. See Section 9.3. Proxies that
plug into this module include xdc.runtime.SysMin and
xdc.runtime.SysStd. See Section 6.3.
Startup Allows functions defined by different modules to be run before
main(). See Section 6.5.
Defaults Sets event logging, assertion checking, and memory use options for
all modules for which you do not explicitly set a value. See Section
7.7.1 and Section 9.5.1.1.
Main Sets event logging and assertion checking options that apply to your
application code.
Program Sets options for runtime memory sizes, program build options, and
memory sections and segments. This module is used as the "root"
for the configuration object model. This module is in the xdc.cfg
package. See Section 3.3.1, Section 6.4, and Section 7.3.2.
Memory Management Memory Creates/frees memory heaps statically or dynamically. See Section
7.7.
Diagnostics Log and
Loggers
Allows events to be logged and then passes those events to a Log
handler. Proxies that plug into this module include
xdc.runtime.LoggerBuf and xdc.runtime.LoggerSys. See Section
9.2.1 and Section 3.5.4.
Error Allows raising, checking, and handling errors defined by any
modules. See Section 6.7 and Section 9.3.
Diags Allows diagnostics to be enabled/disabled at either configuration- or
runtime on a per-module basis. See Section 9.5.1.
Timestamp
and Providers
Provides time-stamping APIs that forward calls to a platform-specific
time stamper (or one provided by CCS). See Section 5.5,
Text Provides string management services to minimize the string data
required on the target. See Section 6.8.
Synchronization Gate Protects against concurrent access to critical data structures. See
Section 4.3.
Sync Provides basic synchronization between threads using wait() and
signal() functions. See Section E.6.
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