CN101593116A - A kind of loading method, portable terminal that is applied to embedded real-time operating system - Google Patents
A kind of loading method, portable terminal that is applied to embedded real-time operating system Download PDFInfo
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- CN101593116A CN101593116A CNA2008101125988A CN200810112598A CN101593116A CN 101593116 A CN101593116 A CN 101593116A CN A2008101125988 A CNA2008101125988 A CN A2008101125988A CN 200810112598 A CN200810112598 A CN 200810112598A CN 101593116 A CN101593116 A CN 101593116A
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Abstract
The invention provides a kind of loading method, portable terminal that is applied to embedded real-time operating system, wherein method comprises: after the real time operating system operation, in internal memory, occupy the pre-occupied area of predetermined length, generate new thread if described real time operating system is judged, then described new thread has been loaded into described pre-occupied area.Use the technology that the preferred embodiment of the present invention provides, in the internal memory of embedded real-time operating system, occupy the space of pre-sizing of the internal memory of embedded real-time operating system, when being loaded with the application program of usefulness, the space that occupies is in advance replaced, revise the code area symbolic address simultaneously, to reach purpose to the internal memory loading of embedded real-time operating system.
Description
Technical field
The present invention relates to the portable terminal application technology, be meant a kind of loading method, portable terminal that is applied to embedded real-time operating system especially.
Background technology
In recent years along with the development of portable terminal technology, function that portable terminal provided and professional kind constantly increase, the speed of upgrading and upgrading is constantly accelerated, and the user is more and more higher to mobile terminal function and service quality requirements, therefore the application program that loads in the portable terminal is more and more, the memory source that these application programs take is more and more, and this causes, and real-time loading application programs also becomes more difficult in portable terminal.
In the prior art, the real time operating system of portable terminal can realize the true-time operation of application programs, ensures the real-time of high-priority task with this, improves the reliability and stability of system.
But the inventor finds by analyzing, and this application program being loaded in the process of internal memory, but can't realize real-time loading, has influenced the functions expanding of service quality and portable terminal.
Summary of the invention
The purpose of the embodiment of the invention provides a kind of loading method, portable terminal that is applied to embedded real-time operating system, is used to solve the real-time loading that prior art can't realize application program, influences the defective that service quality and mobile terminal function are expanded.
A kind of loading method that is applied to embedded real-time operating system after the real time operating system operation, occupies the pre-occupied area of predetermined length in internal memory, generated new thread if described real time operating system is judged, then described new thread is loaded into described pre-occupied area.
A kind of portable terminal comprises at least: internal memory is used to predetermined new thread that pre-occupied area is provided; Call unit is used for invokes application and generates corresponding new thread, and described new thread leaves in the described pre-occupied area.
Use the technology that the preferred embodiment of the present invention provides, in the internal memory of embedded real-time operating system, occupy the space of pre-sizing of the internal memory of embedded real-time operating system, when being loaded with the application program of usefulness, the space that occupies is in advance replaced, revise the code area symbolic address simultaneously, to reach purpose to the internal memory loading of embedded real-time operating system.
Description of drawings
Fig. 1 is a logical organization synoptic diagram in the embodiment of the invention internal memory;
Fig. 2 is the logical organization synoptic diagram of a thread of the embodiment of the invention;
Fig. 3 loads the logical organization synoptic diagram of new thread behind the internal memory in real time for the embodiment of the invention;
Fig. 4 loads the schematic flow sheet of new thread in real time for the embodiment of the invention;
Fig. 5 is an embodiment of the invention portable terminal inner structure synoptic diagram.
Embodiment
For making purpose of the present invention, technical characterictic and implementation result clearer, below in conjunction with the accompanying drawings and the specific embodiments the preferred embodiments of the present invention are described in detail.
At different application programs, in internal memory, occupy the memory headroom of corresponding size in advance, when real-time loading application programs, occupied memory headroom is replaced, simultaneously can revise the code area symbolic address, load in order in embedded real-time operating system, to realize real-time internal memory.
As shown in Figure 1, embedded real-time operating system is current is managing a plurality of threads, is without loss of generality, and described a plurality of threads are divided into: thread A, thread B and thread C, the corresponding application program of each thread; Wherein, the run time version district among Fig. 1 is used to deposit the run time version of a plurality of described threads, and the data field then is used to deposit the data of a plurality of threads, is divided into: data A, data B and data C.Among described thread A, thread B and the thread C, thread C is useless program, has guaranteed that promptly this portable terminal can execution thread C.
By the position of run time version in the run time version district of real time operating system record thread C, determine by the length of record start address, run time version; The data that record thread C uses are determined by the length of record start address, data in the position of data field.Wherein, the zone that the run time version of thread C occupies can be called the pre-occupied area of run time version, and the zone that data occupy can be called the pre-occupied area of data.
In order to indicate that in real time operating system this thread C corresponding application program C is useless program, can show it itself is useless program among the application program C by the setting of macro definition or other zone bits, described real time operating system invokes application C, generate thread C, and the pre-occupied area of run time version and the pre-occupied area of data of opening up enough sizes in the run time version district and the data field of internal memory.
When needs loaded new application program D to internal memory, real time operating system was called this application program D and is generated thread D, and this thread D comprises as shown in Figure 2: file header D, run time version D and data D; Wherein, file header D comprises the essential information of this application program D, file size for example, and relevant macro definition or the like, run time version D has write down run time version, and data D has then write down the data message that this application program D uses.
Be loaded in the process of internal memory at thread D, as shown in Figure 3, the start address of run time version C is sought in the run time version district of real time operating system in internal memory, and calculate end address, run time version D is loaded into the pre-occupied area of the occupied run time version of run time version C, and data D is loaded into the pre-occupied area of the occupied data of data C in the data field.
More than described and utilized useless program committed memory and when loading new application program, by new application program being replaced run time version and the data of useless program in internal memory, selected embodiment is the situation when only loading the corresponding thread of a new application program; When the present invention also provides a kind of preferred embodiment to be used for needing at the same time to load a plurality of new thread, with a plurality of length that are about to the new thread of loading, mate with the length of useless thread, determine that according to predefined standard a new thread that is fit to the most loads, more rationally must use internal memory.
For example, useless thread C has taken the length of about 1KB in the pre-occupied area of run time version, taken the length of about 3KB in the pre-occupied area of data, current have new thread E simultaneously, F, G is at the application memory headroom, then at first judge new thread E, F, the G run time version separately and the length of data compare with the length of the code of useless thread C in pre-occupied area of described run time version and the pre-occupied area of data, select one can effectively utilize the new thread of internal memory to load, a comparatively simple method is exactly: with new thread E, F, the length of the run time version of each thread and data compares with useless thread C respectively among the G, has only when run time version length and satisfies smaller or equal to 1KB, when data length satisfies smaller or equal to 3KB simultaneously, just further consider and replace the memory headroom that useless thread C is occupied.
If have only thread E to satisfy above-mentioned two conditions simultaneously, then have only thread E can replace the memory headroom that useless thread C is occupied; If new thread E is arranged, F all can satisfy above-mentioned two conditions simultaneously, then further to new thread E, F selects, and the standard of selection can preestablish, and the present invention selects a preferred embodiment to be described: with described new thread E, the length addition of the run time version of F and data, obtain total length, described total length and the run time version of useless thread C and the most approaching new thread of corresponding length of data will be replaced the shared memory headroom of useless thread C.
In order further to disclose the principle of work of technical solution of the present invention, as shown in Figure 4, specifically describe as follows to loading procedure:
Portable terminal is after beginning to enter running status;
Step 401. real time operating system invokes application C generates corresponding thread C, and begins to carry out this thread C.
Step 402. invokes application D, and generate corresponding thread D.
The run time version of step 403. thread D is loaded into the run time version of thread C in the pre-occupied area of shared run time version, run time version district.
The data load of step 404. thread D is to the data data pre-occupied area shared in the data field of thread C.
Step 405. writes down or revises the symbolic address of the run time version of thread D in the run time version district in real time operating system.
Step 406. thread D jumps to the assigned address of the run time version in the pre-occupied area of run time version, and begins to carry out.
More than described and used a useless application program to occupy space in the internal memory in advance, when in internal memory, being loaded with the new application program of usefulness, in the new thread that new application program generates, run time version and data occupy the space of useless application program in internal memory respectively; Further, if not only one of new thread then needs all new thread are calculated in advance, select a most suitable new thread to replace useless thread occupation space then.
Corresponding with above method, the present invention also provide a kind of in embedded real-time operating system the portable terminal of loading application programs.
As shown in Figure 5, portable terminal comprises: internal memory 501, record cell 502, call unit 503; Wherein internal memory is divided into: run time version district 5011 and data field 5012.In the process of running of mobile terminal:
When running of mobile terminal, call unit 503 at first calls a useless application program unavailable_App, and generate corresponding thread unavailable_Thread, the content of thread unavailable_Thread leaves in the internal memory 501, wherein, thread unavailable_Thread comprises run time version and data, and run time version leaves in the run time version district 5011, and deposit data is in data field 5012.
If portable terminal as required at this moment, call an application program by call unit 503, then this call unit 503 generates new thread according to application program, obtaining thread unavailable_Thread from described record cell 502 puts and second reference position in data field 5012 in the first start bit in run time version district 5011, leave the run time version of described new thread in described first start bit and put in the run time version district 5011 of beginning, with described new thread deposit data in the data field 5012 that second reference position begins.
Use the technical scheme that the above preferred embodiment of the present invention provides, in the internal memory of embedded real-time operating system, occupy the space of pre-sizing of the internal memory of embedded real-time operating system, when being loaded with the application program of usefulness, the space that occupies is in advance replaced, revise the code area symbolic address simultaneously, to reach purpose to the internal memory loading of embedded real-time operating system.
Should be noted that above preferred embodiment is only unrestricted in order to technical scheme of the present invention to be described, all parameter values can be according to the actual conditions adjustment, and in this rights protection scope.Those of ordinary skill in the art should be appreciated that and can make amendment or be equal to replacement technical scheme of the present invention, and do not break away from the spiritual scope of technical solution of the present invention, and it all should be encompassed in the middle of the claim scope of the present invention.
Claims (11)
1. a loading method that is applied to embedded real-time operating system is characterized in that,
After the real time operating system operation, in internal memory, occupy the pre-occupied area of predetermined length,
Generate new thread if described real time operating system is judged, then described new thread has been loaded into described pre-occupied area.
2. method according to claim 1 is characterized in that, the described pre-occupied area that occupies predetermined length in internal memory further comprises: described real time operating system is called useless application program, and generates corresponding useless thread;
The run time version of described useless thread is loaded into the pre-occupied area of described run time version, and the data load of described useless thread is to the pre-occupied area of described data.
3. method according to claim 1 is characterized in that, described new thread is loaded into described pre-occupied area and further comprises: the run time version of described new thread is loaded into the pre-occupied area of described run time version, and the data load of described new thread is to the pre-occupied area of described data.
4. method according to claim 3 is characterized in that, described described new thread is loaded into also comprises before the described pre-occupied area:
Current described new thread is more than one, then judge the length of run time version length smaller or equal to the pre-occupied area of described run time version, and data length is carried in pre-occupied area of described run time version and the pre-occupied area of described data smaller or equal to the described new thread of the length of the pre-occupied area of described data.
5. method according to claim 2 is characterized in that, after the described pre-occupied area of data that occupies predetermined length,
Write down the reference position and the length of the pre-occupied area of described run time version; And write down the reference position and the length of the pre-occupied area of described data.
6. method according to claim 2 is characterized in that, the data load of described new thread arrives after the pre-occupied area of described data,
Jump to the assigned address of described new thread in the pre-occupied area of described run time version, and begin to carry out this new thread.
7. method according to claim 2 is characterized in that, the data load of described new thread arrives after the pre-occupied area of described data,
If the length of the run time version of described new thread less than the length of the pre-occupied area of described run time version, then discharges the remainder of the pre-occupied area of described run time version;
If the length of the data of described new thread less than the length of the pre-occupied area of described data, then discharges the remainder of the pre-occupied area of described data.
8. a portable terminal is characterized in that, comprises at least:
Internal memory is used to predetermined new thread that pre-occupied area is provided;
Call unit is used for invokes application and generates corresponding new thread, and described new thread leaves in the described pre-occupied area.
9. portable terminal according to claim 8 is characterized in that, described pre-occupied area comprises: pre-occupied area of run time version and the pre-occupied area of data;
The run time version of described new thread is carried in the pre-occupied area of described run time version, and the data load of described new thread is in the pre-occupied area of described data.
10. portable terminal according to claim 8 is characterized in that, also comprises:
Record cell is used for writing down the information parameter of described new thread in described pre-occupied area.
11. portable terminal according to claim 10 is characterized in that, described information parameter comprises at least:
Reference position, length and/or the final position of described new thread in described run time version district;
Reference position, length and/or the final position of described new thread in described data field.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101125988A CN101593116A (en) | 2008-05-26 | 2008-05-26 | A kind of loading method, portable terminal that is applied to embedded real-time operating system |
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| Application Number | Priority Date | Filing Date | Title |
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| CNA2008101125988A CN101593116A (en) | 2008-05-26 | 2008-05-26 | A kind of loading method, portable terminal that is applied to embedded real-time operating system |
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| CN101593116A true CN101593116A (en) | 2009-12-02 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102819439A (en) * | 2011-06-10 | 2012-12-12 | 中兴通讯股份有限公司 | Method and device of dynamically loading multi-system application programs based on relocation |
| WO2016131313A1 (en) * | 2015-07-17 | 2016-08-25 | 中兴通讯股份有限公司 | Code loading method and apparatus for embedded operating system |
-
2008
- 2008-05-26 CN CNA2008101125988A patent/CN101593116A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102819439A (en) * | 2011-06-10 | 2012-12-12 | 中兴通讯股份有限公司 | Method and device of dynamically loading multi-system application programs based on relocation |
| WO2016131313A1 (en) * | 2015-07-17 | 2016-08-25 | 中兴通讯股份有限公司 | Code loading method and apparatus for embedded operating system |
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Open date: 20091202 |